Error reporting mechanism (icmp), Computer Network Security

Assignment Help:

ERROR REPORTING MECHANISM (ICMP)

INTRODUCTION:

 IP gives best-effort delivery. Delivery causes can be ignored; datagrams may be 'dropped on the ground'. Internet Control Message Protocol gives error-reporting mechanism.

 

BEST-EFFORT ERROR AND SEMANTICS DETECTION:

Internet layer can check a variety of errors: e.g.

  • Checksum
  • TTL expires
  • No route to receiver network.
  • Can't deliver to receiver host.

 

Internet layer discards datagrams with causes.

INTERNET CONTROL MESSAGE PROTOCOL:

Some errors can be noticed.  Router transmits message back to host in datagram. Message has information about problem. It is included in IP datagram.

TYPES OF MESSAGES:

Internet control Message Protocol (ICMP) describes error and informational messages. These are shown as follows:

1. ERROR MESSAGES:

These are as given:

  • Source quench
  • Time exceeded
  • Destination unreachable
  • Redirect
  • Fragmentation required

2. INFORMATIONAL MESSAGES:

These are as given:

  • Echo request/reply
  • Address mask request /reply
  • Router discovery

ICMP MESSAGE TRANSPORT:

 ICMP message transport is performed upon by getting ICMP included in IP. This is given in the figure below:

 

1981_ERROR REPORTING MECHANISM (ICMP).png


Related Discussions:- Error reporting mechanism (icmp)

Cost benefit analysis (cba)-information security, Cost Benefit Analysis (CB...

Cost Benefit Analysis (CBA) The common approach for information security controls is economic feasibility of implementation. CBA is begun by evaluating the worth of assets which

Assignment, Hello i have submitted an assignment and i am still waiting to ...

Hello i have submitted an assignment and i am still waiting to know if it has been accepted or not the ref number is TicketID: EM201381BRY525CN, the due date is for monday 27th of

Backup, types of firewall and backup

types of firewall and backup

Network management system, Question (a) Draw a typical hybrid star-rin...

Question (a) Draw a typical hybrid star-ring topology paying attention to how the clients and switching hubs are connected. (b) State 3 main differences between a router

What is triple key management scheme, Q. What is Triple Key Management Sche...

Q. What is Triple Key Management Scheme? The triple key management mechanism provides optimum security by enabling the use of two pre-deployed keys for each of the WS nodes, an

Explain briefly how go-back-n operates, Question: a) There are two basi...

Question: a) There are two basic approaches to dealing with errors in the presence of pipelining. One way is Go-Back-N and the other strategy is Selective Repeat. i. Explain

Ip datagram, IP DATAGRAM Various options can be included to IP header,...

IP DATAGRAM Various options can be included to IP header, e.g., source route, record route and timestamp. Header with no function has H. LEN field value 5; data starts immedia

Cryptographic algorithms-cryptography, Cryptographic algorithms Cryptogr...

Cryptographic algorithms Cryptographic algorithms are broadly classified into two broad categories. They are stated below 1.  Symmetric Encryption and 2.  Asymmetric Encryptio

Network simplex method, QUESTION: (a) Briefly explain the steps invol...

QUESTION: (a) Briefly explain the steps involved in Network Simplex Method. (b) What data structures you would expect in the Network Simplex Method. Show the data struct

Routers, Routers They transfer packets among multiple interconnected n...

Routers They transfer packets among multiple interconnected network machines (i.e. LANs of different kind). They perform in the data link, physical and network layers. They ha

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