Output port - network layer and routing , Computer Networking

Assignment Help:

Output Port

The function of the  port is  take  the packets that have  been stored in the out  put port  memory and transmits them over the out going  link. The queuing  and buffer management  functionality required  when  the switch  fabric  delivers packets to the output  ports  at a rate that exceeds the output  link  rate.

2095_output port 236.png

                                                                    Figure  output  port processing

Output   port  queuing is that a packet scheduler  at the output  port must  over packet among  those queued for transmission. This selection might  be done  on a simple  basis. Such  as first  come first served scheduling. Or a more sophisticated scheduling  such a weighted fair queuing which shares the outgoing  link  fairly among  the different  end to end  connections  that have  packet  queued for transmission.

2055_output.png

                                                                           Figure output port queuing

Figure  shows  the output port  queuing. At time a packet has arrived at each of the  incoming  input  ports each destined  for the  outgoing port. Assuming identical line  speeds  and a switch  operating at three times  the line speed, one  time unit  latter that is in the time  needed to receive or send a packet all three original packets have been transferred to the outgoing out and are queued awaiting  transmission. In the next time  unit  one of these three packets will have been transmitted over the outgoing link. By  the example  two new packet shave arrived at the  incoming  side  of the switch  one of these  packets  is destined for output  port.


Related Discussions:- Output port - network layer and routing

What is sockets, A socket is an abstraction that shows an endpoint of commu...

A socket is an abstraction that shows an endpoint of communication. Most applications that consciously use TCP and UDP do so by making a socket of the appropriate type and then per

computer computinons, Difference between synchronous tdm and statistical t...

Difference between synchronous tdm and statistical tdm

Give the types of firewalls, Give the types of firewalls Conceptually,...

Give the types of firewalls Conceptually, there are two types of firewalls: 1.  Network Level 2.  Application Level Network Level Firewall/Packet Filters The Net

Show the subnetting process, Q. Show the Subnetting process? Subnettin...

Q. Show the Subnetting process? Subnetting (cont) Subnetting creates an intermediary level of hierarchy IP datagram routing then involves three steps: delivery t

Dijkstra algorithms - network layer and routing , Dijkstra Algorithms T...

Dijkstra Algorithms To calculate its  routing  table  each router applies an algorithm  called  the dijkstra algorithm to its  state database. The dijkstra algorithm  calculate

State the methods to keep the attackers at bay, State the methods to keep t...

State the methods to keep the attackers at bay Another best methods to keep the attackers at bay is known as network address translator or NAT. The philosophy behind the design

What is the routing algorithm used by rip and igrp, Distance vector-based r...

Distance vector-based routing algorithms (also called as Bellman-Ford algorithms) pass periodic copies of a routing table from router to router. Regular updates among routers commu

State the benefits of infrared light, State the benefits of Infrared light ...

State the benefits of Infrared light Infrared light does not penetrate walls or other opaque objects. This has two benefits: First, infrared communications can be more simply

Explain what is meant by circuit switching, Question 1: (a) Explain wh...

Question 1: (a) Explain what is meant by circuit switching? Give its main shortcoming and explain its relevance in telephone systems. (b) Outline the differences betwee

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd