What does 'TTL' stand for?

The data transfer mode of FTP, in which all the fragmentation is done by TCP, is ________

What is the expansion of the acronym SMTP?

Anarkali digitally signs a message and sends it to Salim. Verification of the signature by Salim requires

A data communication system spanning states, countries, or the whole world is called a ____

In a network, if P is the only packet being transmitted and there was no earlier transmission, which of the following delays could be zero?

For the IEEE 802.11 MAC protocol for wireless communication, which of the following statements is/are TRUE?

I. At least three non-overlapping channels are available for transmissions. II. The RTS-CTS mechanism is used for collision detection. III. Unicast frames are ACKed.

Which of the following is true of signature-based intrusion detection systems (IDSes)?

Consider a socket API on Linux machine that supports UDP socket. A connected UDP socket is a UDP socket on which connect function has already been called. Which of the following statements is/are correct ?

I. A connected UDP socket can be used to communicate with multiple peers simultaneously. II. A process can successfully call connect function again for an already connected UDP socket.

Consider a LAN with four nodes S1, S2, S3 and S4. Time is divided into fixed-size slots, and a node can begin its transmission only at the beginning of a slot. A collision is said to have occurred if more than one node transmits in the same slot. The probabilities of a node generating a frame in a time slot are 0.1 for S1, 0.2 for S2, 0.3 for S3, and 0.4 for S4. The probability of sending a frame in the first slot without any collision by any of these four stations is