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Definition
| 802.3 twisted pair Ethernet cable. 10 indicates a bandwidth of 10 Mbps, Base indicates baseband technology, and the T indicates that it’s twisted pair. |
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| The central device, or hub, through which signals pass in a wireless network. |
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| Layer 7 in the OSI reference model provides interfaces that enable applications to request and receive network services. |
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| The weakening of a signal as it travels the length of a medium, which eventually causes the signal to be unreadable. |
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| The range of frequencies that a communications medium can carry. For baseband networking media, the bandwidth also indicates the theoretical maximum amount of data that the medium can transfer. For broadband networking media, the bandwidth is measured by the variations that any single carrier frequency can carry, minus the analog-to-digital conversion overhead. |
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| The process a computer goes through while starting; also called booting. |
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| Data frames with destination addresses that specify that all computers on a network must read and process these frames |
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| A network topology in which the computers connect to a backbone cable segment to form a straight line. |
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| A type of cable that uses an center conductor, wrapped by an insulating layer and surrounded by a braided wire mesh and an outer jacket or sheath, to carry high-bandwidth signals, such as network traffic or broadcast television frequencies. “Coax” is often used as a shortened form of “coaxial cable” |
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| A specialized collection of parallel lines in a PC used to transfer data between the CPU and peripheral devices and occasionally from one peripheral device to another. |
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| Domain Name System. A TCP/IP protocol used to associate a computer’s IP address with a name. |
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| The representation of 0s and 1s as a physical signal, such as electrical voltage or a light pulse. |
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| The location of the cabling and equipment that connects a corporate network to a third party telecommunications provider. |
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| A cabling technology that uses pulses of light sent along a light-conducting fiber at the heart of the cable to transfer information from sender to receiver. Fiber-optic cable can send data in only one direction, so two cables are required to permit network devices to exchange data in both directions. |
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| A high speed, external serial bus that supports bandwidths up to 400 Mbps and can connect up to 63 devices; also known as IEEE 1394. FireWire is used for streaming video and multimedia, networking, and attaching video devices to computers |
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| The central point of a star network |
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| The weakening of signals that occurs on a cable segment each time a network device is attached. Necessary restrictions on the maximum number of devices keep the signals that traverse the network clean and strong enough to remain intelligible to all devices |
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| The time a signal takes to travel from one end of a cable to the other. |
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| (Media Access Control) The number that identifies the physical address of a network computer. This address is burned into the computer’s NIC in the form of data programmed onto the interface’s ROM. |
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| A hybrid network topology in which all computers connect to each other. This topology is used for fault tolerance. |
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Definition
| Frames that use a special destination address that any computer listening for this address can read and process the frame’s idea. |
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| A protocol that establishes and manages communications between computers and provides naming services. |
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| (Network interface card) Mediates communication between a computer and the networking medium. |
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| The technique of spreading bits of data across multiple parallel data lines to transmit them simultaneously, instead of according to an ordinal and temporal sequence. |
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| Protocol Data Unit a unit of information passed as a self-contained data structure from one layer to another on its way up or down the network protocol stack. |
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| layer 1, the bottom layer of the OSI reference model, transmits and receives signals and specifies the physical details of cables, adapter cards, connectors, and hardware behavior |
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| layer six of the OSI reference model, data can be encrypted and/or compressed to facilitate delivery. Platform specific application formats are translated into generic data formats for transmission or from generic data formats into platform specific application formats for delivery to the application layer. |
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| a network topology consisting of computers connected in a circle, forming a closed ring. |
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| a network layer service that determines how to deliver an outgoing packet of data from sender to receiver. Routing entails several methods for managing delivery and requires error and status reporting so that the senders can determine whether packets are reaching the receivers. |
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| a technique for transmitting data signals this in each bit's worth of data (or its analog equipment) one at a time, one after another, in sequence. |
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Definition
| layer 5 of the OSI reference model is responsible for setting up, maintaining, and in the ongoing sequences of communications (called sessions) across a network. |
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| the name assigned to a wireless LAN |
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| a network topology in which computers connect through a central connecting point, usually a hub. |
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| a specification for how all network media should be installed to maximize performance and efficiency |
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Definition
| a form of twisted-pair cable that includes no additional shielding material in the cable composition. This cable encloses one or more pairs of twisted cables inside outer jacket. |
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Definition
| Wired Equivalency Protocol -- a form of wireless security that encrypts data so that unauthorized people receiving wireless network signals can't interpret the daily. |
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Term
| the OSI reference model divides networking activity into how many layers? |
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Definition
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| the addition of information to a PDU as it's passed from one layer to the next is called which of the following? |
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Active Working Groups and Study Groups
* 802.1 Higher Layer LAN Protocols Working Group
o Link Security Executive Committee Study Group is now part of 802.1
* 802.3 Ethernet Working Group
* 802.11 Wireless LAN Working Group
* 802.15 Wireless Personal Area Network (WPAN) Working Group
* 802.16 Broadband Wireless Access Working Group
* 802.17 Resilient Packet Ring Working Group
* 802.18 Radio Regulatory TAG
* 802.19 Coexistence TAG
* 802.20 Mobile Broadband Wireless Access (MBWA) Working Group
* 802.21 Media Independent Handoff Working Group
* 802.22 Wireless Regional Area Networks
Inactive Working Groups and Study Groups
* 802.2 Logical Link Control Working Group
* 802.5 Token Ring Working Group
* 802.12 Demand Priority Working Group |
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Definition
| collection of related software elements and services that correspond to the layers of the OSI model, instead of a single massive program |
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Definition
| passed as a self-contained data structure from one layer to another on its way up or down the protocol stack |
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Definition
| handles data-formatting information for network communications |
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Definition
| operates at the presentation layer |
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Definition
| handles addressing messages for delivery and translates logical addresses into their physical counterparts |
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Definition
| manages the transfer of data from one application to another across a network |
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Definition
| ensures that the recipient of transmitted data isn’t overwhelmed with more data than it can handle |
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Definition
| sends PDUs from the Network layer to the Physical layer |
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Term
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Definition
| its value is the result of a mathematical function based on data in the frame and is recalculated on the receiving end |
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Term
| In the OSI reference model, the ____ layer is layer 6. |
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Definition
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| Access control is handled at the ____ layer during the routing process; the router consults a list of rules before forwarding an incoming packet to determine whether a packet meeting certain criteria (such as source and destination address) should be perm |
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Definition
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| The PDU at the Data Link layer is called a ____. |
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Definition
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| The PDU at the Network layer is called a ____. |
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Definition
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| The PDU at the Transport layer is called a ____. |
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| The job of the ____ to convert bits into signals for outgoing messages and signals into bits for incoming messages. |
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Definition
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| A frame is usually addressed to only one computer and is called a ____ frame. |
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| In some cases, special frames called ____ frames are created for all computers on a network. |
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Definition
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| ____ frames are created for any computers on a network that “listen” to a shared network address. |
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| The IEEE standard ____ covers all forms of Ethernet media and interfaces, from 10 Mbps to 10 Gbps (10 Gigabit Ethernet). |
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| The IEEE standard ____ covers error control and flow control over data frames. |
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| In the OSI reference model, the ____ layer is layer 7. |
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| The IEEE standard ____ sets standards for wireless networking for many different broadcast frequencies and techniques. |
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| ____ functions at the Application layer of the OSI reference model. |
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Definition
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| ____ functions at the Transport layer of the OSI reference model. |
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Definition
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| ____ functions at the Network layer of the OSI reference model. |
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Definition
| rules and procedures for communicating |
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Definition
| term used to describe a protocol suite that functions at the Network layer |
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Definition
| provides data transport services |
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| TCP/IP’s protocol responsible for transferring e-mail |
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| TCP/IP’s protocol used to provide file transfer services |
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| TCP/IP’s protocol used to manage and monitor network devices |
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Definition
| Novell’s client shells and redirectors |
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Definition
| ____ is Novell’s protocol for packet routing and forwarding. |
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Term
| ____ is a name-to-address resolution protocol that functionally operates at the Session layer of the OSI model. |
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Definition
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Term
| ____ is a remote terminal emulation protocol that operates at all three upper layers and is used mostly to provide connectivity between dissimilar systems. |
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| An IP address is divided into two distinct parts: one part designates the logical network the computer is a part of, while the remainder of the address represents the ____. |
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Term
| Class ____ addresses begin with network IDs between 128 and 191. |
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Definition
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Term
| Class ____ networks are limited to 254 hosts per network |
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Definition
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| Class ____ addresses are reserved for experimental use and cannot be used for address assignment. |
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Definition
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Term
| The reserved name localhost always corresponds to the IP address ____. |
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Definition
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Term
| A subnet mask is a ____-bit number that’s always assigned to a host when the IP address is assigned. |
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Definition
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Term
| The default Class C subnet mask is ____. |
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Definition
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Term
| In an APIPA-enabled operating system, the computer assigns itself an address from the special range of addresses that begin with ____. |
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On the Internet and most LANs, connectionless protocols are used for the majority of data transfers.
T or F? |
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Definition
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Term
Internet Protocol version 4 (IPv4), or just IP, is a Transport layer protocol that provides source and destination addressing and routing for the TCP/IP suite.
T or F? |
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Definition
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Term
Class A addresses are intended for use by large corporations and governments.
T or F? |
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Definition
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One major benefit of using DHCP is the ease with which computers can be moved.
T or F? |
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Definition
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Term
Although installing several protocols on a machine to ensure interoperability with any operating system might be tempting, adding unnecessary protocols can have a detrimental effect on network performance.
T or F? |
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Definition
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