computer networks Problem 1 Fill in the blanks. [1 pt per question) 1. From a sy

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computer networks

Problem 1 Fill in the blanks. [1 pt per question) 1. From a system view, the Internet consists of a network of interconnected ISP networks , and 2. Specify whether the connection between hosts and the access router is shared or dedicated for each of the following access networks: DSL and cellular and 3. The two key network-core functions are 4. The four sources of packet delay at a single hop include processing delay. 5. The three tiers of Internet core are: Tier-1 ISPs/large content provider 6. T (True) or F (False): Client process is a process running on a client 7. T or F: Any single-bit error can be detected by checksum, but a multi- 8. A UDP socket is uniquely identified by 9. Give two reasons for an application to prefer UDP over TCP: 10. Suppose host A sends a TCP segment to host B with sequence number , transmission delay, and networks and host, and server process is a process running on a server host. bit error may not. and and 22, acknowledgement number 89, and a payload of 120 bytes. The return segment from and acknowledgement number

Explanation / Answer

1) It consists of ISP's, high speed dedicated connections and end user or organization.

After ISP's we will have the connections then finally the end user

2) DSL is dedicated whereas Cellular is shared between hosts and access router.

3) Authentication and call control and switching

4) Queuing and Propogation Delay

5) Tier 2 will exchange internet traffic through peering agreements and Tier 3 is Internet Transit

6) True

7) True Check Sum can detect single bit errors only

8) Protocol Header and Ports

9) Less Delay and for Multicasting applications

10) Sequence Number 90 and Acknowledgement number 22

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