Nt1310 Unit 7
HW1
1. Describe the common points between virtual circuit switching and circuit switching, and the common points between virtual circuit switching and datagram switching.
Answer: Virtual circuit switching and circuit switching: Both require a link to be established before data is transferred and torn off once the transmission is over. Both have bandwidth efficiency.
Virtual Circuit switching and datagram switching: Both transmit data using packet multiplexing. The packets are stored and then forwarded from each node in the path.
2. List the major advantages and disadvantages with the layered approach to protocols.
Answer: Advantages: The system is divided into different sub systems according to different functions hence, …show more content…
4. Suppose you are running a home business and want a very reliable Internet connection (say, you have 4 computers and you don’t want a disruption of more than 1 minute). Explain how you would design this home network. (hint, consider the following potential failures: your Internet Service Provider (ISP), your router)
Answer: Since,the failure of ISP and router has to be taken care of we can have two ISP and routers.Whenever one ISP fails the network switches to the other ISP.This results in the use of two routers..Also ,since it is a home network we can use a star topology and link all home computers to the ISP and router.Because we have proposed design in which there are two ISPs and routers we can use “Double-star Architecture”
5. In a lot of cases exactly one protocol data unit in layer N is encapsulated in a PDU at layer (N-1). It is also possible to break one N-level PDU into multiple (N-1)-level PDUs (segmentation) or to group multiple N-level PDUs into one (N-1)-level PDU (blocking). a. In the case of segmentation, is it necessary that each (N-1)-level segment contain a copy of the N-level
1. Describe the common points between virtual circuit switching and circuit switching, and the common points between virtual circuit switching and datagram switching.
Answer: Virtual circuit switching and circuit switching: Both require a link to be established before data is transferred and torn off once the transmission is over. Both have bandwidth efficiency.
Virtual Circuit switching and datagram switching: Both transmit data using packet multiplexing. The packets are stored and then forwarded from each node in the path.
2. List the major advantages and disadvantages with the layered approach to protocols.
Answer: Advantages: The system is divided into different sub systems according to different functions hence, …show more content…
4. Suppose you are running a home business and want a very reliable Internet connection (say, you have 4 computers and you don’t want a disruption of more than 1 minute). Explain how you would design this home network. (hint, consider the following potential failures: your Internet Service Provider (ISP), your router)
Answer: Since,the failure of ISP and router has to be taken care of we can have two ISP and routers.Whenever one ISP fails the network switches to the other ISP.This results in the use of two routers..Also ,since it is a home network we can use a star topology and link all home computers to the ISP and router.Because we have proposed design in which there are two ISPs and routers we can use “Double-star Architecture”
5. In a lot of cases exactly one protocol data unit in layer N is encapsulated in a PDU at layer (N-1). It is also possible to break one N-level PDU into multiple (N-1)-level PDUs (segmentation) or to group multiple N-level PDUs into one (N-1)-level PDU (blocking). a. In the case of segmentation, is it necessary that each (N-1)-level segment contain a copy of the N-level