The physical layer is responsible for

Which of these is not a guided media?

Which of the following is different from the others?

Which of the following are DNS record types?

Which of the following is an example of a dynamic routing algorithm?

In packet switching systems, resources are allocated on demand.

What will be the efficiency of a Stop and Wait protocol, if the transmission time for a frame is 20 ns and the propagation time is 30 ns?

In the TCP/IP model, the layer that receives data at device B after it is sent from device A is the ____________

In Remote Procedure Calls (RPC), while a server is processing the call, the client is blocked unless the client sends an asynchronous request to the server.

In a communication network, a packet of length L bits takes link L1 with a probability of p1 or link L2 with a probability of p2. Link L1 and L2 have a bit error probability of b1 and b2 respectively. The probability that the packet will be received without error via either L1 or L2 is