Computer Networ...

Let X and Y be the two stations on an Ethernet and both stations have a ready state of frames to send. Both X and Y attempt to transmit a frame after the first collision. What is the probability that neither X nor Y wins?

If an 16 bit frame sequence numbers is used in selective repeat protocol then the maximum window size for the data transmission is _____?

Sender X wants to transfer (7766554433221100)₈ message to sender Y. Sender X uses the CRC polynomial x11 + x10 +x8+ x5 + x4 + x + 1. What is the corresponding octal number generated by the CRC generator?

A bit-stuffing based framing protocol uses an 8-bit delimiter pattern of HDLC’s flag. If the input bit string is 1011111110111110, then the output bit string after stuffing is

In GB4, if every 8^th packet is lost and we have to send 16 packets, then number of packets to be transmitted is __________.

In a simplified time slotted MAC protocol, where each host send data with a probability of 0.3 in every slot. There is no backup algorithm used in collision. What is the maximum number of hosts which this protocol can support, if each host has to be provided a minimum throughput of 0.21 frames per slot?

The message 11010101 is to be transmitted using the CRC polynomial x³ + x² + 1 to protect it from error. The message that should be transmitted is

In a network, two systems are connected and the distance between the system is 5000 km. The propagation speed of the medium is 2 × 10⁷ m/s. The bandwidth of the network is 500 MBps. If the average packet size is 108 bits and the network is used to its full capacity. The minimum size of the sequence number field is n bits. The processing delay at nodes is 0 ms. What is the value of n in case of Go-Back-N sliding window protocol?

Which of the following statement/s is/are false?

I. In the continuous ARQ protocol, the sender sends the frames continuously without waiting for acknowledgement.

II. In go-back-n ARQ, the timer expires the sender sends all outstanding frames.  

Consider two systems A and B connected with each other and bound to stop and wait protocol. System A needed to transfer 570 packets to system B but system A ended up sending 750 packets in the link. The error in the link is _____ percentage?