C


CA (Certificate Authority)

A service that issues digital certificates to users and computers. In addition, CAs maintain a current list of revoked certificates that are no longer considered valid.



caching

A high-speed access mechanism in which routes, addresses, logon/authentication data, or DNS resolutions are stored in memory to speed further requests for the information.



caching-only server

A DNS server that does not have authority for any zone because it does not store any zone information. It doesn't provide authoritative answers for other DNS servers, but it responds with the information in its cache.



callback

A feature of RRAS that allows RRAS to call a user back by initiating a new connection to the user's predefined phone number after the user's initial modem connection has ended. Callback is used mostly for security reasons, and it can also be used to minimize the user's long-distance charges.



capture filter

A filter that can be configured for the Network Monitor and that filters out packets not specifically configured for capture.



cell

See packet.



certificate

A credential that is used to authenticate the origin, identity, and purpose of the public half of a public/private key pair. A certificate ensures that the data sent and received is kept secure.



CHAP (Challenge Handshake Authentication Protocol)

An encrypted authentication scheme in which an unencrypted password is not sent over the network. CHAP is defined in RFC 1994 and is supported by RRAS to allow legacy and non-Windows clients to dial in and authenticate to a Windows Server 2003 remote access server.



child domain

A Windows Active Directory domain that exists directly beneath a parent domain in a tree hierarchy.



CIDR (classless interdomain routing)

A more efficient IP address management system than the original class-based system of Class A, B, and C networks. CIDR is typically used by routers and gateways located on the Internet backbone for routing packets across the Internet. CIDR allows any number of contiguous bits in the IP address to be used at the network ID, resulting in more IP addresses becoming available.



Class A network

The largest of the classes of IP networks. There are 126 Class A networks, each capable of addressing up to 16,777,214 hosts. Class A networks have a first octet between 1 and 126, with a default subnet mask of 255.0.0.0.



Class B network

The second-largest class of IP networks. There are 16,384 Class B networks, each capable of addressing up to 65,534 hosts. Class B networks have a first octet between 128 and 191, with a default subnet mask of 255.255.0.0.



Class C network

The smallest class of IP networks. There are 2,097,152 Class C networks, each capable of addressing up to 254 hosts. Class C networks have a first octet between 192 and 223, with a default subnet mask of 255.255.255.0.



cluster

A technology that allows for multiple servers to provide fail-over of services.



CNAME (Canonical Name) record

A record in a DNS zone file that acts as an alias for another entry in the DNS zone, allowing a single server to be mapped to multiple names. For example, a CNAME record could be used to map server a51svr3842.area51partners.com to the alias www.area51partners.com.



Compatible template

A security template that provides a means of allowing members of the Users group to run applications that do not conform to the Windows Logo Program by modifying the default file and registry permissions that are granted to the Users group.



conditional forwarding

A new feature in Windows Server 2003 DNS that allows administrators to direct DNS requests to other DNS servers based on domain. Also known as intelligent forwarding.



convergence

A state in which all the routers in a network are aware of all available routes. Convergence is usually referred to in conjunction with the RIP, OSPF, or BGP TCP/IP routing protocols.



counter log

A log that can be created by using the Performance console for later viewing and comparison against current performance statistics.



CSV (comma-separated values)

A file format that is used by text files that contain fields of data separated by commas and carriage returns.






MCSA(s)MCSE 70-291(c) Implementing, Managing, and Maintaining a Microsoft Windows Server 2003 Network Infrastructure
MCSA/MCSE 70-291: Implementing, Managing, and Maintaining a Microsoft Windows Server 2003 Network Infrastructure (Exam Prep)
ISBN: 0789736497
EAN: 2147483647
Year: 2006
Pages: 196
Authors: Will Schmied

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