gloss_C

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C

campus network.
A campus network connects LANs from multiple departments within a single building or campus. Campus networks are typically local area networks; that is, they don't include wire-area network services, though they may span several miles.
campus wiring system.
A campus wiring system is the part of a structured wiring system that connects multiple buildings to a centralized main distribution facility, local exchange carrier, or other point of demarcation . It is also referred to as a backbone.
Carrier Sense, Multiple Access with Collision Detection (CSMA/CD).
Ethernet and 802.3 LANs use the CSMA/CD access method. In CSMA/CD, each network device waits for a time when the network is not busy before transmitting-they detect transmissions already on the wire from other stations .
cascaded star.
A cascaded star topology is a network configuration in which multiple data centers or hubs are constructed for the purposes of redundancy. It is also called a tree topology.
Category 1.
The Electronics Industry Association/Telecommunications Industry Association (EIA/TIA) specifies a five-level standard for commercial building telecommunications wiring. Category 1 wiring is old-style unshielded twisted-pair telephone cable, and it is not suitable for data transmission.
Category 2.
The EIA/TIA 568 standard certifies Category 2 UTP for use up to 4MHz. Category 2 UTP is similar to the IBM Cabling System Type 3 cable.
Category 3.
The EIA/TIA 568 standard specifies Category 3 UTP for speeds up to 10MHz, and it is the minimum-performance cable required for 10BaseT. The wire pairs should have at least three twists per foot , but no two pairs should have the same twist pattern.
Category 4.
The EIA/TIA 568 standard specifies Category 4 as the lowest grade UTP acceptable for 16Mbit/sec Token Ring.
Category 5.
The EIA/TIA 568 standard specifies that Category 5 is certified up to 100MHz. It is suitable for FDDI over copper , 100BaseT and other high-speed networks.
cell relay.
Cell relay is a form of packet transmission used by Broadband ISDN networks. Also called ATM, cell relay transmits 53-octet fixed-length packets over a packet-switched network. ATM is important because it makes it possible to use a single transmission scheme for voice, data, and video traffic on LANs and WANs.
cell.
A fixed-length packet. For example, Asynchronous Transfer Mode (ATM) uses 53-octet cells .
CIF
With resolution of 352 horizontal pixels by 288 vertical pixels, the Common Intermediate Format is a popular size for video conferencing images. For lower bandwidth applications, video systems often use either QCIF (Quarter CIF), which displays images at 176 pixel by 144 pixel resolution, or SQCIF (Sub-Quarter CIF), which is actually one-ninth of CIF's resolution, at 128 pixels by 96 pixels. High-bandwidth video can be described as 4CIF (704 pixels by 576 pixels) or 16CIF (1,408 pixels by 1,152 pixels). See H.261.
client.
A client is a computer that requests network or application services from a server. A client has only one user ; a server is shared by many users.
CMIP
The Common Management Information Protocol is the network management standard for OSI networks. It has some features that are lacking in SNMP and SNMP-2, and is more complex. CMIP has a far smaller mind share and market share than SNMP in North America, though support for this standard is sometimes mandated , especially in Europe. See MIB, SNMP.
coaxial cable.
Coaxial cable has an inner conductor made of a solid wire that is surrounded by insulation and wrapped in metal screen. Its axis of curvature coincides with the inner conductors, hence the name coaxial. Ethernet and ARCnet can use coaxial cable. It is commonly called coax.
common carrier.
A common carrier is a licensed, private utility company that provides data and voice communication services for a fee. For example, Sprint and MCI are common carriers .
Common Management Information Protocol (CMIP).
CMIP is the OSI management information protocol for network management. It is not as widely implemented as SNMP, the IETF management protocol. See CMIP.
compression.
A technique to "squash" files, making them smaller to optimize bandwidth utilization. Compression is important for WAN transmission and disk and tape storage.
concentrator.
A concentrator is a multiport repeater or hub that brings together the connections from multiple network nodes. Concentrators have moved past their origins as wire concentration centers, and often include bridging, routing, and management devices.
Connectionless Network Protocol (CLNP).
Of the two OSI transport protocols-CLNP and Connection-Oriented Network Service (CONS)-CLNP is more efficient for LANs. Like TCP/IP, it uses datagrams to route network messages by including addressing information in each.
Connection-Oriented Network Service (CONS).
Of the two OSI transport protocols-CLNP and CONS-CONS is more efficient for WANs. CONS allows the transport layer to bypass CLNP when a single logical X.25 network is used.
Consultative Committee for International Telegraphy and Telephony (CCITT).
The CCITT defines international telecommunications and data communication standards. In March of 1993, the group changed its name to ITU-TS.
Controlled Access Unit (CAU).
A CAU is a managed Multistation Access Unit (MAU), or a managed multiport wiring hub for Token Ring networks. Management features include turning ports on and off.
CTI
Computer-Telephony Integration relates to the implementation of traditional telephone-based audio (and sometimes video) services over a data network. CTI may be implemented over systems that guarantee bandwidth, such as ATM, or over frame-based networks like Ethernet or frame relay.
 
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Network Tutorial
Lan Tutorial With Glossary of Terms: A Complete Introduction to Local Area Networks (Lan Networking Library)
ISBN: 0879303794
EAN: 2147483647
Year: 2003
Pages: 193

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