Skip to content- Draw and Explain 802.3 frame format.
- What is time domain reflectometry? Write about 802.3 cabling.
- PPP is based closely on HDLC, which uses bit stuffing to prevent accidental flag bytes within the payload from causing confusion. Give at least one reason why PPP uses character stuffing instead.
- Imagine a sliding window protocol using so many bits for sequence numbers that wrap around never occurs. What relations must hold among the four window edges and the window size?
- Compare and contrast OSI and TCP/IP models.
- Briefly explain about the TCP/IP reference model.
- Draw and Explain the hardware architecture of a Simple set-top box.
- What is MOSPF? Discuss briefly about Multicast Backbone.
- What are blocking calls, primitives and non-blocking primitives?
- What is Nagle’s algorithm? Explain the problem of silly window syndrome: suggest a solution to this problem.
- Briefly discuss about connection less Internetworking.
- Briefly discuss about Concatenated Virtual Circuits.
- Why does the maximum packet lifetime, T, have to be large enough to ensure that not only the packet, but also its acknowledgements, have vanished?
- Suppose that the clock-driven scheme for generating initial sequence numbers is used with a 15-bit wide clock counter. The clock ticks once every 100msec, and the maximum packet lifetime is 60sec. How often need resynchronization take place
i. in the worst case?
ii. when the data consumes 240 sequence numbers/min?
- Imagine a generalized n-army problem, in which the agreement of any two of the armies is sufficient for victory. Does a protocol exist that allows blue to win?
- A computer on a 6-Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 1Mbps. It is initially filled to capacity with 8 megabits. How long can the computer transmit at the full 6 Mbps?
- Briefly discuss about congestion control in VC subnets.
- Ten thousand airline reservation stations are competing for the sue of a single slotted ALOHA channel. The average station makes 18 requests/hour. A slot is 125 μsec. What is the approximate total channel load?
- Explain in detail the operation of slotted ALOHA.
- Data link protocols almost always put the CRC in a trailer, rather than in a header. Why?
- When bit stuffing is used, is it possible for the loss, insertion, or modification of a single bit to cause an error not detected by the checksum? If not, why not? If so, how? Does the checksum length play a role here?
- The following data fragment occurs in the middle of a data stream for which the character-stuffing algorithm described in the text is used: DLE, STX, A, DLE, B, DLE, ETX. What is the output after stuffing?
- Write Shortnotes on Interfaces and services of ISO Layers
- List two advantages and two disadvantages of having international standards for network, Protocols?