Idea of “The IEEE standardized protocol”-Part-9

Protocol type:

A field in the IP header that identifies the type of header that follows the IP header,typically a Layer 4 header,such as TCP or UDP.ACLs can examine the protocol type to match packets with a particular value in this header field.

PVC :

Permanent Virtual Circuit. A predefined VC.A PVC can be equated to a leased line in concept.

Q.921 :

An ITU-T specification for the ISDN User-Network Interface 9UNI) data link layer.

Q.931 :

An ITU-T specification for signaling to establish,maintain,and clear ISDN network connections.

Reference point :

An ISDN term that refers to the various interfaces between ISDN devices that implement different ISDN function groups.

RIP :

Routing Information Protocol.An Interior Gateway Protocol (IGP) supplied with UNIX Berkeley Standard Distribution (BSD)systems.Rip is the most common IGP in the Internet.It uses hop count as a routing metric.

Root bridge :

A bridge That exchanges topology information with designated bridges in a spanning-tree implementation to notify all other bridges in the network when topology changes are required.

Route summarization :

A consolidation of advertise address which causes a single summary route to be advertised.

RSTP :

Rapid Spanning Tree Protocol,defined in IEEE 802.1w,defines an improved version of STP that converges much more quickly and consistently than STP (802.1d).

SLSM :

Static-length subnet mask.The usage of the same subnet mask for all subnets of a single Class A,B,or C network.