Saturday, 3 September 2016

Hop Count

When data packets travels in a network from source to destination, it must pass through some bridges, routers and gateways. Each time the packet passed to the next network device, a hop occurs.

A hop count refers to the number of intermediate devices the packet crosses between the source and destination.

Distance Vector Routing Protocol

DVRP is one of the two major routing protocols for communications methods that use data packets sent over Internet Protocol (IP).
It requires a routing hardware to report the distances of various nodes within a network or IP topology in order to determine the best and most efficient routes to pass the packets.

DVRP tends to contemplate only two factors : Distance and Vector

Distance is the nothing but a number of steps or hosts, a message go through to reach its destination.

Vector describes the trajectory of the message over a given set of network nodes.

Thursday, 1 September 2016


Bufferbloat is a high latency in packet-switched network, caused by excess buffering of packets.
It also causes packet delay variation (Jitter).
When bufferbloat presence, it may slow down the loading of web page, and simple DNS queries may fail due to timeouts.


Routing Information Protocol
It's port number - 520
One of the oldest distance vector routing protocol, routing metric as hop count.
Currently, IGRP, OSPF, IS-IS are in use.