Answer / roop&

Cyclic Redundancy Check and Data LINK Layer

Answer / chandru

A CRC(Cyclic Redundancy Check)is an error-detecting
code.Happens at Data link layer.

Answer / jitendera

Crc calculation method
______________*_____________________
This is the topic consern with BE btech studendt

let take a simple example.

Let's do a simple example, dividing a message 100110 by the
key 101.
100110 = x^5 + x^2 + x (why i have writen this.count from
left threr is 6 numrix value so it sholud start frrom x5
and last is x^0

simalry 101 is x2 + 1.(it is key value with degree 2 max
degree)

Since the degree of the key is 2, we start by appending two
zeros to our message.

10011000 / 101
101

111
101

100
101

100
101

01


We don't even bother calculating the quotient, all we need
is the remainder (the CRC), which is 01 in this case. The
original message with the CRC attached reads 10011001. You
can easily convince itself that it is divisible by the key,
101, with no remainder.

In practice we don't write the top bit of the key--it is
implicit. In this particular example, we would only store
bits 01 as our key.

Answer / ravi

hi jitendera
i am ravi here and i am an engineering student from delhi i
have lots of interest in computer network.i was in serch of
the crc calculation method.i went through tennon bom and
frozen but not able to get understand then i came to google
and on serching i found your reply on that site and now
after reading yours answer and i find no any difficulty to
understand it now i can solve more complex polynomilas
based upon yours consept.many many thanks to you.
if you donot mind may i post some basic coputer network
question of our sylebus in which i am facing difficulty?.

thanks aagin

Identify 2 features of PPP CHAP authentication? A.) Username and password is sent in clear text B.) Authentication messages are sent periodically during the connection C.) Less secure then PAP D.) Local router 'challenges' the remote router

1 Answers  

---

Can you give an overview of various components in IPSec?

0 Answers   CCIE,

---

What is default size of hello packets in ospf?

0 Answers  

---

What is a L2F protocol?

1 Answers   CCIE,

---

what is the boot seqance of cisco router

5 Answers  

---

Hello Every one. Actually its my first time to using this site and first time to posting a question. Actually i need to know about CCNA Exam. Please can any one tell me about the Exam style and any recommendation for study? Best Regards to all the Friends

1 Answers  

---

CO is an acronym for which of the following? A.) Central Office B.) Capital Office C.) Central Operator D.) Company Office

1 Answers  

---

What is the difference between simple authentication and md5?

0 Answers  

---

whats the routing protocol supporting in both juniper , cisco routers.

10 Answers   HCL,

---

Cisco routers can secure the enable password with a one-way hash algorithm. What command would encrypt the enable password with the strong encryption method? A.) enable encrypt john B.) password john C.) enable secret john D.) enable password john E.) secret john F.) enable password 5 john

1 Answers  

---

Which three are typical operational phases in a basic connection oriented network service? A. call setup B. data transfer C. load balancing D. call termination E. caller ID F. call prionflication G. data segmentation H. data and momma I. data link identification J. callering book

1 Answers  

---

what is the reason for creating vlans

4 Answers  

---