Term
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Definition
| breaks up a collision Domain. Each port is a collision domain. |
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Term
| What does a Router break up? |
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Definition
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Term
| Physical, Data Link, Network, Transport, Session, Presentation, Application |
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Definition
| Are the 7 Layers of the OSI Model |
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Term
| What does the Application Layer do? |
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Definition
| Responsible for applications connecting to the network. Examples are File Transfers, Email, Remote access, etc. |
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Term
| What does the Presentation Layer do? |
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Definition
| Presents data to the application layer. Responsible for data translation and decoding. ASCII, data encryption, etc. |
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Term
| What does the session layer do? |
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Definition
| Resposinble for settings up, managing, and tearing down presentation layer entities. Keeps application data seperate from others. |
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Term
| What does the Transport Layer Do? |
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Definition
| Segments and reassembles data into a data stream. Performs error correction before retransmitting. TCP & UDP are examples. |
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Term
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Definition
| Is part of the transport layer and prevents hosts from overflowing hosts on the other end of a connections which results in lost data. |
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Term
| What is a 3-way handshake? |
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Definition
Steps into creating a successful connection with another device.
1. Request for Syncronization (SYN)
2. ACK request and establish connection
3. Connection established. |
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Term
| What is a buffer in regards to a 3-way handshake? |
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Definition
| A buffer is memory and is where flood of datagrams are stored. If memory runs out the device issues a "not ready" until it processes memory in it's queue. |
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Term
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Definition
The amount of bytes of data a machine is allowed to send at one time before having to recieve an ACK.
For example window size of 3 means, it can send 3 bytes of data before it has to reciev an ACK. |
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Term
| What does the network layer do? |
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Definition
| Uses addressing and path determination. |
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Term
| By default a router will not... |
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Definition
| ..forward any multicast or broadcast address. |
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Term
| What is the Data Link Layer? |
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Definition
| Provides physical transmission of data, handles error notifications and flow control. Ensures messages are delivered to the proper device on a LAN using MAC addresses. Combines bits into bytes and bytes into frames. |
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Term
| What layer does a switch work at? |
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Definition
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Term
| What layer does a router work at? |
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Definition
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Term
| What are the Two Sublayers of the Data Link layer |
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Definition
Media Access Control (MAC) 802.3
Logical Link Control (LLC) 802.2 |
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Term
| What is Media Access Control? |
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Definition
| Defines how pakets are placed on the media, everyone shares the same bandwidth. Physical Addressing |
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Term
| What is Logical Link Control? |
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Definition
| Identidies network layer protocols and encapsulation them. LLC header tells the data link layer what to do with a packet. |
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Term
| What layer does a bridge work at? |
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Definition
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Term
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Definition
| A list of MAC Addresses that a switch receives. Associates it with the port it was received on. |
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Term
| What is transparent bridging? |
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Definition
| When a switch receives a frame, it only forwards it out the segment that the destination MAC address is on. If it does not know of the destination, it forwards out all connected segments. |
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Term
| What does the physical layer do? |
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Definition
| Sends and receives bits. DTE & DCE |
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Term
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Definition
| Data Communication Unit, Used at service provider end |
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Term
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Definition
| Data Terminal Equipment, Attached device. |
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Term
| What layer do hubs work at |
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Definition
|
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Term
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Definition
| Multiport repeater. Forwards to all active segments. Creates one collision, and broadcast doamin. All devices share the same bandwidth. |
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Term
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Definition
| Use of only one wire pair to transmit data. Used when a hub is attached to a switch |
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Term
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Definition
| Uses two wired pairs. Faster data transmission. One pair for sending, one for receiving. Less collisions. |
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Term
| When is full duplex used? |
|
Definition
Switch to host
Switch to switch
host to host using crossover cable. |
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Term
|
Definition
|
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Term
|
Definition
| Gigabit ethernet on Category 5 |
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Term
|
Definition
| 10GBps over fiber or coax |
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Term
| What is the PDU for the trasnport layer? |
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Definition
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|
Term
| What is the PDU for the Network Layer? |
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Definition
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Term
| What is the PDU for the Data Link Layer |
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Definition
|
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Term
| What is the PDU for the Physical Layer |
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Definition
|
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Term
|
Definition
| Switches traffic as quick as possible. No routing takes place. |
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Term
| What is the distribution Layer? |
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Definition
| Provides routing and filtering. Place to implement policies. |
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Term
| What is the access layer? |
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Definition
| Where user resources are located. Where static routing takes place. |
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Term
| When should you use a straight through cable? |
|
Definition
Host to switch or hub
Router to switch or hub |
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Term
| When should you use a crossover cable? |
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Definition
Switch to Switch
Hub to hub
host to host
hub to switch
router to host |
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|
Term
| When should you use a rolled over cable? |
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Definition
|
|
Term
| What are the number mappings for a straight through cable |
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Definition
|
|
Term
| What are the number mappings for a crossover? |
|
Definition
|
|
Term
| what are the number mappings for a rollover cable |
|
Definition
1 to 8
2 to 7
3 to 6
4 to 5
5 to 4
6 to 3
7 to 2
8 to 1 |
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Term
| Which layer chooses and determines the avaialibility of communicating partners along with the resources necessary to make the connection, coordinates partnering applications. |
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Definition
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Term
| Which layer is responsible for converting data packets into electrical signals. |
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Definition
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Term
| At which layer is routing implemented, enabling connections and path selection between two end systems. |
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Definition
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Term
| Which layer defines how data is formatted, presented, encoded, and converted for use on the network. |
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Definition
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Term
| Which layer is responsible for creating, managing and terminating sessions between applications. |
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Definition
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Term
| Which layer ensures trustworthy data across a physical link and is concerned with physical addressing, line discipline, network topology, error notification and flow control |
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Definition
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Term
| Which layer is used for reliable communication between end nodes over the network and provides methods for establishing, maintaining, and terminating virtual circuits and flow control of information. |
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Definition
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Term
| Which layer provides logical addressing that routers use for path determination |
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Definition
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Term
| Which layer specifies voltage, wire speed, and pinout cables and moves bits between devices |
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Definition
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Term
| This devices creates one big collision domain and one large broadcast domain |
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Definition
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|
Term
| This devices creates many smaller collision domains but one large brodcast domain |
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Definition
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|
Term
| This device can never run Full Duplex |
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Definition
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Term
| This device breaks up collision and broadcast domains |
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Definition
|
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Term
| What are the 4 main router functions |
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Definition
| Packet Switching, Packet Filtering, Internetwork Communication, Path Selection. |
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Term
| Which two fields are contained within an IEEE Ethernet Frame Header |
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Definition
Source and Destination MAC Addresses
FCS Field. |
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Term
| What is the purpose of segmenting a bridge |
|
Definition
Create more Collision domains
Add bandwidth for users. |
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Term
| What are the tree connections that can use Full Duplex |
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Definition
Host to Host
Switch to Host
Switch to Switch |
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