Computer Networks

Error Detection and Correction Codes

Error Detecting codes Whenever a message is transmitted then there are changes that it get scrambled by noise or data gets corrupted. When we add some additional data to...

Go Back n Protocol

Go-Back-N error recovery is a procedure which is implemented in some communications protocols to provide reliability. Go-Back-N ARQ (is one of a number of error recovery procedures to detect...

1-bit Sliding Window Protocol

Window size 1. Stop-and-wait. Must get ack before can send next frame. Both machines are sending and receiving. Combined in one loop here. Let us assume one goes first....

Comparison of Datagram and Virtual Circuit Subnet

   Datagram  Virtual Circuit  Connection Setup  None  Required  Addressing  Packet contains full source and destination address  Packet contains short virtual circuit number identifier.  State Information  None other than router...

Distance Vector Routing Protocol

Distance Vector Routers use distance vector–based routing protocols to periodically advertise the routes in their routing tables. Routing information exchanged between typical distance vector–based routers is unsynchronized and unacknowledged....

The problem of hidden terminal and exposed terminal in wireless networks

The Hidden Station Problem Figure 1 illustrates the hidden terminal problem. Suppose that node A wants to transmit to node B located at a distance x from A. By...

Wireless LAN protocol

Protocols: IEEE 802.11 The original 2.4 GHz wireless LAN protocol, but also includes infrared communication too. Data rates available are 1 and 2 Mbps. The protocol uses the 2.4...

Various congestion prevention policies at datalink, network and transport layer of the OSI

Leaky Bucket Algorithm

• It is a traffic shaping mechanism that controls the amount and the rate of the traffic sent to the network. • A leaky bucket algorithm shapes bursty traffic...

Differences between distance vector and link state routing protocol

Particular Distance Vector Routing Protocol Link State Routing Protocol Example of RIP, IGRP OSPF, IS-IS Algorithm Bellmon-ford Shortest Path first (SPF) Support subnet Only Classfull Routing Classfull, Classless, VLSM,...