Which of the following transport layer protocolss is used to support electronic mail?

In the IPv4 addressing format, the number of networks allowed under Class C addresses is

Consider a source computer (S) transmitting a file of size 106 bits to a destination computer (D) over a network of two routers (R1 and R2) and three links (L1, L2 and L3). L1 connects S to R1;L2 connects R1 to R2; and L3 connects R2 to D. Let each link be of length 100km. Assume signals travel over each link at a speed of 10^8 meters per second. Assume that the link bandwidth on each link is 1Mbps. Let the file be broken down into 1000 packets each of size 1000 bits. Find the total sum of transmission and propagation delays in transmitting the file from S to D?

Packets of the same session may be routed through different paths in:

The address resolution protocol (ARP) is used for:

The maximum window size for data transmission using the selective reject protocol with n-bit frame sequence numbers is:

If a class B network on the Internet has a subnet mask of 255.255.248.0, what is the maximum number of hosts per subnet?

What is the maximum size of data that the application layer can pass on to the TCP layer below?

A client process P needs to make a TCP connection to a server process S. Consider the following situation: the server process S executes a socket(), a bind() and a listen() system call in that order, following which it is preempted. Subsequently, the client process P executes a socket() system call followed by connect() system call to connect to the server process S. The server process has not executed any accept() system call. Which one of the following events could take place?

Which one of the following uses UDP as the transport protocol?

In Ethernet when Manchester encoding is used, the bit rate is:

Match The following

(P) SMTP ----------- (1) Application layer

(Q) BGP ----------- (2) Transport layer

(R) TCP ----------- (3) Data link layer

(S) PPP ----------- (4) Network layer

--------------------- (5) Physical layer

Station A uses 32 byte packets to transmit messages to Station B using a sliding window protocol. The round trip delay between A and B is 80 milliseconds and the bottleneck bandwidth on the path between A and B is 128 kbps. What is the optimal window size that A should use?

Station A needs to send a message consisting of 9 packets to Station B using a sliding window (window size 3) and go-back-n error control strategy. All packets are ready and immediately available for transmission. If every 5th packet that A transmits gets lost (but no acks from B ever get lost), then what is the number of packets that A will transmit for sending the message to B?

Frames of 1000 bits are sent over a 10^6 bps duplex link between two hosts. The propagation time is 25ms. Frames are to be transmitted into this link to maximally pack them in transit (within the link).

What is the minimum number of bits (i) that will be required to represent the sequence numbers distinctly? Assume that no time gap needs to be given between transmission of two frames.

Consider the data of previous question. Suppose that the sliding window protocol is used with the sender window size of 2^i where is the number of bits identified in the previous question and acknowledgments are always piggybacked. After sending 2^i frames, what is the minimum time the sender will have to wait before starting transmission of the next frame? (Identify the closest choice ignoring the frame processing time.)

The bandwidth of the line is 1.5 Mbps with round trip time(RTT) as 45 milliseconds.If the size of each packet is 1 KB(kilobytes), then what is the efficiency in Stop and wait protocol?

Which of the following is not true about Subnetting?

Which device uses logical addressing system?

In which of the following protocol(s) it is possible for sender to receive acknowledgement for a packet that falls outside its current window?

The data link layer takes the packets from _____ and encapsulates them into frames for transmission.

Which one of the following task is not done by data link layer?

Which sublayer of the data link layer performs data link functions that depend upon the type of medium?

Header of a frame generally contains:

Automatic repeat request error management mechanism is provided by:

Which one of the following is a data link protocol?

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called:

Which one of the following routing algorithm can be used for network layer design?

Which one of the following is not a function of network layer?