Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Time out
Timers are used to protect against lost packet. Each packet must have its own logical timers since only a single packet will be retransmitted after timeout. A single hardware timer can be used to mimic the function of multiple logical timers.
The SR receiver will acknowledge a correctly received packet whether or not it is in order. Out of order packets are buffered until any missing packets ( that is packets with lower sequence numbers) are received. The various actions taken by the SR receiver.
Packet with sequence number in ( rev base re base + N- 1) is correctly received. In this case the received packet falls within the receiver window and a selective ACK packet is returned to the sender.
If the packet was not previously received it is buffered. If this packet has a sequence number equal to the base of the window then this packet and any previously buffered and consecutively numbered packets are delivered to the receiver. The receiver window is them moved forward by the number of packets delivered to the receiver as in figure when a packet with a sequence number of 2 is received then packets 3, 4 and 5 can be delivered to the receiver.
Packet with sequence number in ( rev base n rev base-1) is received. In this case an ACK must be generated this is the packet which the receiver has previously acknowledge.
Otherwise ignores the packets.
To understand the functions of SR protocols lets take an example of a window size of four packets. The sender can sends packets 0 to 3. If first packet pkt 0 is lost and pkt 1 , 2 and 3 are received by the receiver instead of discarding these packets the receiver buffers the packets and send the ACK for the packets respectively. After the time out of pkt 0 the sender can retransmit this lost packet pkt 0 if the receiver receives the lost packet pkt 0 then the receiver deliver all the packets which was kept buffered by the receiver previously.
There are various computational models for representing the parallel computers. In this part, we discuss various models. These models would give a platform for the designing as wel
Question: (a) Show the main elements of the GSM system architecture and describe their functions. (b) Looking at the HLR/VLR database approach used in GSM-how does this arc
Address Resolution Protocol resolves the MAC address if the IP address is known. It is a layer 3 protocol.
What are different ways of securing a computer network? There are lots of ways to do this. Install reliable and updated anti-virus program on all computers. Make sure firewalls
Process Switching It applies the brute force method to switch packets wih consumption of large amount of CPU time List of items are needed when switching packets Routing
Why Does metric translation takes place in redistributing routes?
What is the Frame relay, in which layer it comes? Ans) Frame relay is an industry standard, shared access, switched Data Link Layer encapsulation that services many virtual circ
How is load balancing acoomplish in IGRP?
what are network performance characteristics?
Cut-Through is the best mode of switching. Store and Forward reads in the whole frame, confirms the frame is valid, and then forwards the frame onto the wire. Cut-Through only chec
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd