PART A: State true or false (1 mark each): 1. Effective communications depends o
ID: 3707689 • Letter: P
Question
PART A: State true or false (1 mark each): 1. Effective communications depends on delivery, accuracy, reliability and jitter a. Answer It is good to have a protocol for communication between two devices but it is not mandatory 2. The entire capacity of a channel is taken over by the sender in simplex and half duplex communications 3. a. Answer 4. De-facto standards are the ones legislated by an officially recognized body 5. There is a logical connection between each layer in the layered communication model 6. TCP/IP defines a specific protocol to be used at the data link layer 7. In the TCP/IP protocol stack, flow control and congestion control services are provided a. Answer: a. Answer: by the IP layer 8. A routing protocol builds the forwarding tables and participates in the routing process 9. ICMP, IGMP, DHCP and ARP are all MAC layer protocols 10. Congestion control is a functionality provided by TCP a. Answer: a. Answer: a. Answer:Explanation / Answer
1).TRUE...Effective communication depends with delivery,accuracy,reliability and jitter but there are more features required to have effective communication.
2).TRUE....without protocol we can have communication but it will be more vulnerable,less effective and will have heavy delay.using protocol makes commuincation effective and secure.
3).TRUE...In simplex data transmission occurs only in one direction so it uses full capacity of channel.In Half duplex data transmission can occur in both directions but one at a time.in either direction data transmission occur it utilises whole capacity of channel.
4).FALSE....De-facto standards are the standards which are based on some factual facts.they don't have official status.
5).TRUE...application layer of TCP/IP at sender is logically connected to application layer at receiver and same goes for rest of other layers as well.
6).TRUE...there are many protocols like DSL,802.11(standard wireless),SONET,etc. defined at data link layer by TCP/IP.
7).FALSE...IP layer of TCP/IP is responsible for proper packetizing of segments,routing,fragmentation,defragmentation,logical addressing,etc.but it does not provide any kind of flow control but it does provide mechanisms for congestion control like using ICMP.
8).TRUE...forwarding tables are built on the basis of routing history so,they can be used in the future for forwarding packets into the network.
9).FAlSE...ICMP,IGMP,DHCP and ARP are all network layer protocol.
10).TRUE...TCP protocol at transport layer provides mechanism like slow start algorithm and congestion avoidance algorithm to provide congestion control at transport layer.
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