Term
| Give and example of a protocol used in the TCP/IP application layer. |
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Definition
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Term
| Give an example of a protocol used in the TCP/IP transport layer. |
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Definition
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Term
| Give an example of a protocol used in the TCP/IP network layer. |
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Definition
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Term
| Give an example of a protocol used in the TCP/IP link layer. |
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Definition
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Term
| What does the TCP/IP application layer do? |
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Definition
| It provides an interface between software running on a computer and the network itself |
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Term
| What does the TCP/IP transport layer do? |
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Definition
| It provides services to the application layer (1 layer up) |
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Term
| What does the TCP/IP network layer do? |
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Definition
| It provides several features, mainly addressing and routing |
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Term
| What does the TCP/IP link layer (data + Physical) do? |
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Definition
| defines protocols and hardware required to deliver data across some physical network. |
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Term
| What is same layer interaction? |
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Definition
| 2 computers use a protocol to communicate with the same layer on another computer. |
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Term
| What is adjacent layer interaction? |
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Definition
| On a single computer one layer provides service to a higher layer. |
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Term
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Definition
| placing headers and sometimes trialers around some data. |
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Term
| What are the layers in the original TCP/IP model? |
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Definition
| application, transport, internet, link |
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Term
| What are the layers in the updated TCP/IP model? |
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Definition
| application, transport, network, data link, physical. |
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Term
| Describe the steps necessary to send data from a TCP/IP host. (5 steps) |
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Definition
| create and encapsulate application data with any required headers, encapsulate the data from app layer inside transport layer header, encapsulate data from transport layer inside network layer (IP) header, encapsulate data from network layer inside data link layer header and trailer, transmit the bits |
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Term
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Definition
| Transport layer data and header |
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Term
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Definition
| Network layer data and header |
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Term
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Definition
| Data link layer data and header and trailer |
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Term
| What are the seven layers of the OSI model? |
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Definition
| Application, presentation, session, transport, network, data link, physical |
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Term
| In the OSI model what does the application layer do? |
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Definition
| Provides interface between communications software and any applications that need to communicate outside the computer where the application resides. |
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Term
| In the OSI model what does the presentation layer do? |
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Definition
| defines and negotiates data formats |
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Term
| In the OSI model what does the session layer do? |
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Definition
| Defines how to start, control, and end conversations (called sessions) |
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Term
| In the OSI model what does the transport layer do? |
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Definition
| Focuses on issues related to data delivery to another computer. |
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Term
| In the OSI model what does the network layer do? |
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Definition
| Defines 3 main features: logical addressing, routing (forwarding), and path determination. |
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Term
| In the OSI model what does the data link layer do? |
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Definition
| Defines rules that determine when a device can send data over a particular medium. |
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Term
| In the OSI model what does the physical layer do? |
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Definition
| Deals with physical characteristics of a transmission medium. |
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Term
| What are the benefits of layered protocol specifications? (6) |
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Definition
| Less complex, standard interfaces, easier to learn, easier to develop, multivendor interoperability, modular engineering. |
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Term
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Definition
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Term
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Definition
| Small office/Home office LAN |
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Term
| What is an Enterprise LAN? |
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Definition
| Much larger scale LAN (business) |
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Term
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Definition
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Term
| What is the speed of an ethernet cable? |
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Definition
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Term
| What is the formal IEEE standard name for ethernet cable? |
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Definition
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Term
| What is the speed of a fast ethernet cable? |
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Definition
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Term
| What is the formal IEEE standard name for fast ethernet cable? |
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Definition
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Term
| What is the speed of a gigabit ethernet cable? |
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Definition
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Term
| What is the IEEE standard name for a gigabit ethernet cable made of copper? |
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Definition
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Term
| What is the IEEE standard name for a gigabit ethernet cable made of fiber? |
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Definition
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Term
| what is the speed of a 10 Gig Ethernet cable? |
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Definition
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Term
| what is the IEEE standard name for a 10 Gig Ethernet cable? |
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Definition
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Term
| What is the common name for 10BASE-T cable? |
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Definition
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Term
| What is the common name for 100BASE-T cable? |
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Definition
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Term
| What is the common name for 1000BASE-T or 1000BASE-LX cable? |
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Definition
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Term
| What is the common name for 10GBASE-T cable? |
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Definition
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Term
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Definition
| Electromagnetic interference |
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Term
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Definition
| EMI between wire pairs in the same cable |
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Term
| What is an Ethernet link? |
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Definition
| Any physical cable between two ethernet nodes. |
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Term
| for 10 and 100 Mbps ethernet, pins 1 and 2 are used for transmitting by the host which pins are used for receiving? |
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Definition
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Term
| Describe a straight through cable pin out. |
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Definition
| The pins on one side of the cable match the pins on the other side of the cable. 1-1. 2-2, 3-3, and 6-6 |
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Term
| Describe a crossover cable pin out. |
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Definition
| The crossover cable pin out crosses the pair at the transmit pins on each device to the receive pins on the opposite device. 1-3, 2-6, 3-1, 6-2 |
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Term
| What are some devices that transmit on pins 1-2? |
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Definition
| PC NIC's, routers, wireless AP (ethernet interface) |
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Term
| What are some devices that transmit on pins 3-6? |
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Definition
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Term
| What is different about 1000BASE-T compared to 10BASE-T and 100BASE-T? |
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Definition
| Requires 4 wire pairs, uses more advanced electronics that allow both ends to transmit and receive simultaneously on each wire pair. |
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Term
| Describe straight through pin out for 1000BASE-T |
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Definition
| Connects each pin with the same number on the other side. |
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Term
| Describe crossover pin out for 1000BASE-T. |
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Definition
| crosses pairs at 1-2 with 3-6, and 4-5 with 7-8 |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the preamble field for? |
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Definition
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the SFD field for? |
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Definition
| Signifies the next byte is the begining of the destination MAC address field |
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the destination MAC address field for? |
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Definition
| identifies the intended recipient of the frame. |
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the source MAC address field for? |
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Definition
| Identifies the sender of the frame. |
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the type field for? |
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Definition
| Defines the type of protocol used in the frame (most likely IPv4 or IPv6) |
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the Data and pad field for? |
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Definition
| holds data from a higher layer and padding to get to minimum length if necessary |
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Term
| in the IEEE 802.3 ethernet header and trailer fields what is the FCS field for? |
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Definition
| Provides a method to determine if there was a transmission error. |
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Term
| how many bytes long is the preamble field? |
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Definition
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Term
| how many bytes long is the SFD field? |
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Definition
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Term
| how many bytes long is the Destination MAC address field? |
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Definition
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Term
| how many bytes long is the source MAC address field? |
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Definition
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Term
| how many bytes long is the type field? |
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Definition
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Term
| how many bytes long is the data and pad field? |
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Definition
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Term
| how many bytes long is the FCS field? |
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Definition
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Term
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Definition
| Originally unique identifier |
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Term
| Explain how MAC addresses are assigned. |
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Definition
| IEEE assigns manufacturer with a unique 3 byte code (OUI)that begins the mac address and then the manufacturer assigns a unique value for the last 3 bytes that has never been used with its OUI |
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Term
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Definition
| logic when port sends data only when not receiving |
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Term
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Definition
| logic that allows for sending and receiving at the same time. |
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Term
| What is a Broadcast address |
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Definition
| frames sent to this address should be delivered to all devices on the LAN. It has a value of FFFF-FFFF-FFFF |
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Term
| what is a multicast address? |
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Definition
| frames sent to a multicast ethernet address will be copied and forwarded to a subset of the devices on the LAN |
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Term
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Definition
| Carrier sense multiple access with collision detection |
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Term
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Definition
| device with a frame to sends listens until ethernet is not busy then begins sending frame, the sender listens while sending to see if a collision occurred, if collision occurs then the device will wait and send again. |
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Term
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Definition
| Customer premises equipment |
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Term
| what does CSU/DSU stand for? |
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Definition
| Channel service unit/data service unit |
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Term
| what is an RJ-48 connector? |
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Definition
| same size and shape as a RJ-45 connector but plugs into a CSU/DSU. |
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Term
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Definition
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Term
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Definition
| Serial cables normally used to connect router and CSU/DSU |
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Term
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Definition
| Data Communication Equipment |
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Term
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Definition
| has a female connector and is used in conjunction with DTE to create a physical WAN link in a lab(does the equivalent of ethernet crossover cable. |
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Term
| what does HDLC stand for? |
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Definition
| High-level data link control |
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Term
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Definition
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Term
| what are the two most popular data link layer protocols used for leased lines between two routers? |
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Definition
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Term
| What is the HDLC header/trailer field equivalent to the Ethernet preamble field? |
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Definition
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Term
| What is the HDLC header/trailer field equivalent to the Ethernet destination address field? |
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Definition
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Term
| What is the HDLC header/trailer field equivalent to the Ethernet type field? |
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Definition
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Term
| What is the HDLC header/trailer field equivalent to the Ethernet FCS field? |
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Definition
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Term
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Definition
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Term
| What Does EoMPLS stand for? |
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Definition
| Ethernet over Multiprotocol Label Switching |
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Term
| what else is EoMPLS know by? |
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Definition
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Term
| What services does EoMPLS provide? |
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Definition
| a Point to point connection between two customer devices, and behavior as if a fiber ethernet link existed between the devices |
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Term
| What are 3 examples of internet access links? |
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Definition
| Leased lines, DSL, and Cable |
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Term
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Definition
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Term
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Definition
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Term
| What does DSLAM stand for? |
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Definition
| Digital subscriber link access multiplexer |
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Term
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Definition
| End user computer in a TCP/IP network |
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Term
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Definition
| Address Resolution Protocol |
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Term
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Definition
| Dynamically learns the data link address of an IP host connected to a LAN |
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Term
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Definition
| Any device that has at least one interface with an IP address that can send and receive IP packets |
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Term
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Definition
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Term
| T/F all IP addresses in same group must not be separated by a router |
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Definition
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Term
| T/F IP addresses separated from each other by a router may not be in different groups. |
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Definition
| false the must be in different groups |
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Term
| what is the range of the first octet of a class A network? |
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Definition
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Term
| what portion of addresses make up class A? |
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Definition
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Term
| what is the range of the first octet of a class B network? |
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Definition
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Term
| what portion of addresses make up class B? |
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Definition
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Term
| What is the range of the first octet of a class C network? |
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Definition
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Term
| what portion of addresses make up class C? |
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Definition
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Term
| What is the range of the first octet of a class D network? |
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Definition
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Term
| What portion of addresses make up class D? |
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Definition
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Term
| What is the range of the first octet of a class E network? |
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Definition
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Term
| What portion of addresses make up class E? |
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Definition
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Term
| What class(es) of networks are unicast? |
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Definition
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Term
| what class(es) of networks are multicast? |
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Definition
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Term
| what class(es) of networks are experimental? |
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Definition
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Term
| What is unique about IP addresses who's first octet begins with a 0 or 127? |
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Definition
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Term
| What is the number of networks you can have in Class A? |
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Definition
|
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Term
| what is the number of hosts/network you can have in Class A? |
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Definition
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Term
| What is the number of networks you can have in Class B? |
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Definition
|
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Term
| what is the number of hosts/network you can have in Class B? |
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Definition
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Term
| what is the number of networks you can have in Class C? |
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Definition
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Term
| what is the number of hosts/network you can have in Class C? |
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Definition
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Term
| What are the valid network ID's for class A network? |
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Definition
|
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Term
| what are the valid network ID's for class B network? |
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Definition
|
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Term
| what are the valid network ID's for a class C network? |
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Definition
| 192.0.0.0 to 223.255.255.0 |
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Term
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Definition
| Subdividing networks ie- 123.23.45.0 subdivides with 123.23.45.1 |
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Term
| describe IPv4 host routing logic assuming the use of subnetting |
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Definition
step 1:if destination IP address is in the same IP subnet as I am send packet directly to destination host
step 2: otherwise send to default gateway |
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Term
| summarize the logic a router uses when it receives a data link frame |
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Definition
1-use data link frame FCS to ensure that frame had no errors
2-discard old data link header and trailer leaving IP packet
3-compare packet destination IP address to routing table and select best route
4-encapsulate IP packet inside new data link header and trailer appropriate for outgoing interface and forward packet |
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Term
| What are the goals of a routing protocol? |
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Definition
-dynamically learn routes and fill routing table
-if more than one route exists choose best route and place in routing table
-notice when routes are not valid and remove them from the table
-if route is removed from table, and a route is available from neighboring router update table with the rout
-work quickly and prevent routing loops |
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Term
| what is convergence time? |
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Definition
| The time it takes between losing a route and finding a working replacement route |
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Term
| what command from a command prompt can you use to view the ARP cache? |
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Definition
|
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Term
| what is multiplexing using TCP port #'s? |
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Definition
| a function that allows receiving hosts to choose the correct application for which the data is destined, based on the port # |
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Term
| what 3 things make up a socket? |
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Definition
| IP address, transport protocol, and a port # |
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Term
| what does SNMP stand for? |
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Definition
| Simple Network Management Protocol |
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Term
| what does TFTP stand for? |
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Definition
| Trivial File Transfer Protocol |
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Term
| what is the well known port number for FTP data? |
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Definition
|
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Term
| what is the well known port number for FTP control? |
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Definition
|
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Term
| what is the well known port number for SSH? |
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Definition
|
|
Term
| what is the well known port number for telnet? |
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Definition
|
|
Term
| what is the well known port number for SMTP? |
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Definition
|
|
Term
| what is the well known port number for DNS? |
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Definition
|
|
Term
| what is the well known port number for DHCP? |
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Definition
|
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Term
| what is the well known port number for TFTP? |
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Definition
|
|
Term
| what is the well known port number for HTTP? |
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Definition
|
|
Term
| what is the well known port number for POP3? |
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Definition
|
|
Term
| what is the well known port number for SNMP? |
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Definition
|
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Term
| what is the well known port number for SSL? |
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Definition
|
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Term
| describe a 3-way handshake |
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Definition
| host sends SYN device on other end sends back SYN, ACK then host sends ACK |
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Term
| how many bytes are in a UDP header? |
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Definition
|
|
Term
| how many bytes are in a TCP header? |
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Definition
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Term
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Definition
| volume of bits/sec needed for application to work well |
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Term
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Definition
| time t takes one IP packet to go from sender to receiver |
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Term
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Definition
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Term
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Definition
| % of packets discarded by a network before it reaches the destination |
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