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.
Compute the shortest path from t to all network nodes.
Switch In a physical ring configuration any disabled or else disconnected node can disable the entire network Use of a switch can permit the ring to bypass an inactive
Q. Explain about Bandwidth – delay product? Bandwidth - delay product - A measure of competence of ARQ system = bandwidth (bits per second) * round-trip delay (in seco
Which layer is responsible for routing by an internetwork Ans) The Network layer is responsible for routing. This is the primary job of routers, which handle at the Network laye
Explain the Forward congestion avoidance process Notifies the user that congestion avoidance process should be initiated where applicable for traffic in the similar direction a
What is the difference between trigger and rule? The triggers are known as implicitly by database generated events, whereas stored procedures are known as explicitly by client
What is meant by horizontal scaling and vertical scaling? Ans) Horizontal scaling means adding or removing client workstations with only a small performance impact. Vertical
DEFINE
Give the Description of security tools Software are coming up in which the user can select the kind of security measure required to be taken for encryption. One such example is
- EIA/ TIA specifies and RJ-45 connector for unshielded twisted-pair (UTP) cable. The letter RJ stand for registered jack and the number 45 refers to a specific wiring sequence.
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