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Computer Networks
1. Differentiate WAN and LAN.
2. Describe the TCP/IP Reference Model with diagram.
3. Explain Circuit switching and message switching.
4. List the functions of (i) Routers (iii) Bridges.
5. State the terms Error Detection and Correction with respect to Data Transmission. Also describe the following concepts with respect to Error Detection and Correction:
a. Parity Bits b. Cyclic Redundancy Check
6. Write short notes on
(i) Non-Persistent CSMA (ii) 1-Persistent CSMA (iii) P - Persistent CSMA.
use of go back n protocal
What is difference among ARP and RARP? The address resolution protocol (ARP) is used to associate the 32 bit IP address with the 48 bit physical address, used by a host or a ro
DNS Message There are the only two kinds of DNS message DNS query and reply messages. Further mote both query and reply message have the same format as shown in figure.
Has a central core conductor covered in an insulating sheath encased in an outer conductor of metal foil RG numbers indicate physical specs such as thickness and type of insula
POWER SUPPLY SYSTEM IN SATELLITE SYSTEM Satellite Earth Station relies on the public power supply system. Two generators (1+1) of 250 KVA each in parallel connection having fa
Q. What is Two Types of Errors? Single-Bit Errors: Merely one bit in the data unit has changed Burst Errors of length 'n': 2 or more bits in the data unit have changed (
Torus: The mesh network with wrap around connections is termed as Tours Network. Figure: Torus network
What is Proxy Sever and Firewall Proxy Sever Also known as a proxy or application level gateway. It is an application that breaks the connection among sender and receiver.
This code properly implements the IP checksum function on a 32-bit machine: unsigned short cksum(unsigned short *buf, int count) { unsigned long sum = 0; while (count--) { sum += *
List the steps included in creating the checksum. a. Separate the data into sections b. Add the sections together using 1's complement arithmetic c. Take the complement o
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