Transport Layer

Question 1

The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are

A
TCP, UDP, UDP and TCP
B
UDP, TCP, TCP and UDP
C
UDP, TCP, UDP and TCP
D
TCP, UDP, TCP and UDP
       Computer-Networks       Transport Layer       GATE 2013
Question 1 Explanation: 
Real time multimedia needs connectionless service, so underlying transport layer protocol used is UDP. File transfer runs over TCP protocol with port no-21.
DNS runs over UDP protocol within port no-53.
Email needs, SMTP protocol which runs over TCP protocol within port no –25.
Question 2

On a TCP connection, current congestion window size is Congestion Window=4 KB. The window size advertised by the receiver is Advertise Window=6 KB. The last byte sent by the sender is LastByteSent=10240 and the last byte acknowledged by the receiver is LastByteAcked=8192. The current window size at the sender is

A
2048 bytes
B
4096 bytes
C
6144 bytes
D
8192 bytes
       Computer-Networks       Transport Layer       GATE 2005-IT
Question 2 Explanation: 
Corrent sender window
= min (4KB, 6KB)
= 4KB
There are 2 questions to complete.
PHP Code Snippets Powered By : XYZScripts.com
error: Content is protected !!