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Command Terminal (CTERM) is a protocol in the Digital Network Architecture for the terminal emulation. CTERM uses DECnet to provide a command terminal connection between DEC terminals and DEC operating systems such as VMS and RSTS/E. DEC/HP Protocol

Compressed Serial Link Internet Protocol (CSLIP), also known as Van Jacobsen TCP header compression, is an extension of SLIP that, when appropriate, allows just header information to be sent across a SLIP connection, reducing overhead and increasing packet throughput on SLIP lines. CSLIP can reduce the TCP header from 40 bytes to seven bytes but with no effects on UDP. IETF Specification: RFC 1114

Carrier Sense Multi-Access (CSMA) is a network access method used on shared network topologies such as Ethernet for a node to verify the absence of other traffic before transmitting on a shared physical medium. CSMA devices attached to the network cable listen (carrier sense) before transmitting. If the channel is in use, devices wait before transmitting. Multiple Access(MA) indicates that many devices can connect to and share the same network. All devices have equal access to use the network when it is clear.

Carrier Sense Multi-Access (CSMA) is a network access method used on shared network topologies such as Ethernet for a node to verify the absence of other traffic before transmitting on a shared physical medium. Collision Detection (CSMA/CD) is one of the methods often used in Ethernet to avoid possible collision, in which when a collision occurs, and both devices stop transmission, wait for a random amount of time, then retransmit. IEEE Specification: IEEE 802.3

Carrier Sense Multi-Access Collision Avoidance (CSMA/CA) is one of the methods in CSMA. CSMA is a network access method used on shared network topologies such as Ethernet for a node to verify the absence of other traffic before transmitting on a shared physical medium. In Collision Avoidance (CA), collisions are avoided because each node signals its intent to transmit before actually doing so. This method is not popular because it requires excessive overhead that reduces performance. CA is used in wireless LAN communications. IEEE Specification: IEEE 802.3

Certificate Request Syntax (CRS) describes syntax for certification requests. A certification request consists of a distinguished name, a public key, and optionally a set of attributes, collectively signed by the entity requesting certification. Certification requests are sent to a certification authority, which transforms the request into an X.509 public-key certificate. IETF Specification: RFC 2986

Constraint-based LDP (CR-LDP) is one of the protocols in the MPLS architecture. It contains extensions for LDP to extend its capabilities, such as setup paths, beyond what is available for the routing protocol. For instance, a LSP (Label Switched Path) can be set up based on explicit route constraints, QoS constraints and other constraints. IETF Specification: RFC 3212

The Common Open Policy Service (COPS) protocol is a simple query and response protocol that can be used to exchange policy information between a policy server (Policy Decision Point or PDP) and its clients (Policy Enforcement Points or PEPs). One example of a policy client is a RSVP router that must exercise policy-based admission control over RSVP usage. At least, one policy server exists in each controlled administrative domain. The COPS protocol has a simple but extensible design. IETF Specification: RFC 2748

OSI Connection-Oriented Network Protocol (CONP) is an OSI network layer protocol that carries upper-layer data and error indications over connection-oriented links. Two types of OSI network layer services are available: Connectionless Network Service (CLNS) and Connection-Mode Network Service (CMNS). CONP, based on the X.25 Packet-Layer Protocol (PLP), provides the interface between CMNS and upper layers. ISO Protocol

CMIP Over TCP/IP (CMOT) is a network management protocol using ISO CMIP to manage IP-based networks. CMOT defines a network management architecture that uses the International Organization for Standardization's (ISO) Common Management Information Services/Common Management Information Protocol (CMIS/CMIP) in the Internet. IETF Specification: RFC 1189