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What is piggybacked ACK
The protocol will be incorrect. Suppose that 3-bit sequence numbers we are using. Consider following situation:
A just send frame 7.
B gets frame and sends a piggybacked ACK.
A gets ACK and sends frames 0-6, all of that get lost.
B times out and again transmits its current frame, with ACK 7.
Look at the situation at A when frame with r.ack = 7 arrive. The key variables are AckExpected = 0, r.ack = 7, and Next Frame to Send = 7. The modified among will return true, causing A to think lost frames were being acknowledged.
How many timers does IGRP has
- Lost as well as delayed ACKs - Bidirectional transmission both side needs both sending and receiving windows Note: In selective repeat ARQ the size of the sender and rece
What are the Internal Threats Internal security problems are probably the most common. One never knows what someone is going to do. Even the most loyal employees or workers can
Ring: It is a simple linear array where end nodes are associated. It is equal to a mesh with wrap around connections. The data transfer in a ring is generally one direction. So,
1. A virtual memory system has a virtual address space of 4 Gigabytes and a page size of 8 Kilobytes. Each page table entry occupies 4 bytes. a) How many bits remain unchanged
Convergence time is slower for Distant Vector routing and is faster for Link State routing.
Q. Quality of Service - multiplicative decrease? Quality of Service The collective consequence of service performance which determines the degree of satisfaction of a
importance of mail server ,proxy server ,modem ,intranet and web site
Can you explain disimilar areas in OSPF
Can you explain the different layers in OSI model?
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