How does this change the sequence number requirements

Assignment Help Basic Computer Science

Reference no: EM131046397

Consider a simple protocol for transferring files over a link. After some initial negotiation, A sends data packets of size 1 KB to B; B then replies with an acknowledgment. A always waits for each ACK before sending the next data packet; this is known as stop-and-wait. Packets that are overdue are presumed lost and are retransmitted.

(a) In the absence of any packet losses or duplications, explain why it is not necessary to include any "sequence number" data in the packet headers.

(b) Suppose that the link can lose occasional packets, but that packets that do arrive always arrive in the order sent. Is a 2-bit sequence number (that is, N mod 4) enough for A and B to detect and resend any lost packets? Is a 1-bit sequence number enough?

(c) Now suppose that the link can deliver out of order, and that sometimes a packet can be delivered as much as 1 minute after subsequent packets. How does this change the sequence number requirements?

Reference no: EM131046397

Questions Cloud

Opportunities for synergies between the two companies : Alpha Industries is considering acquiring Foxtrot Flooring. Foxtrot is worth $20 million to its current owners under its existing operational methods. Due to some opportunities for synergies between the two companies, Alpha believes that Foxtrot i..

Validate the customer complaint : As a network engineer in a Network Operations Center, you are following up on two trouble tickets. You do not have a network management system and you have to use the basic network tools to validate the problem before you can resolve them. Please ..

What are the advantages of advertising during the super bowl : The Super Bowl is the most watched program on television, and many just tune in to watch the ads. What are the advantages of advertising during the Super Bowl? What are the disadvantages of advertising during the Super Bowl? How can Super Bowl ad..

Relate product and technology management : Using ISO certification, relate product and technology management. This is in line with quality management.

How does this change the sequence number requirements : Now suppose that the link can deliver out of order, and that sometimes a packet can be delivered as much as 1 minute after subsequent packets. How does this change the sequence number requirements?

Draw an er diagram for the database : Given the above description, draw an ER diagram for the database. State any assumptions you make for your ER-diagram to support your design. Include the following into your design:

How does this differ from stdm : How does this differ from STDM? How does network utilization of this scheme compare with STDM?

Requiring a system recovery : Tapes are sent offsite for disaster recovery every morning at 10 a.m. The customer experiences a system crash on the Wednesday of the third week at 3 p.m., requiring a system recovery. How many days worth of tapes need to be retrieved to perform a..

Discuss the relative performance needs of the following app : Discuss the relative performance needs of the following applications, in terms of average bandwidth, peak bandwidth, latency, jitter, and loss tolerance:

User Account

All Pages