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Consider the following statements about the functionality of an IP based router. I. A router does not modify the IP packets during forwarding. II. It is not necessary for a router to implement any routing protocol. III. A router should reassemble IP fragments if the MTU of the outgoing link is larger than the size of the incoming IP packet. Which of the above statements is/are TRUE?

Consider the following statements about the functionality of an IP based router. I. A router does not modify the IP packets during forwarding. II. It is not necessary for a router to implement any routing protocol. III. A router should reassemble IP fragments if the MTU of the outgoing link is larger than the size of the incoming IP packet. Which of the above statements is/are TRUE? Correct Answer II only

Statement I is FALSE. An IP packet gets modified after router has processed it because the Time to Live (TTL) field in IP header is decremented by 1.

Statement II is TRUE. A router need not necessarily implement a routing protocol. If no routing protocol is specified for a router, default routing with address 0.0.0.0 is implemented.

Statement III is FALSE. Re-assembly of IP fragments into a single IP packet is done only at the receiver site.

Related Questions

Consider the following statements about the routing protocols. Routing Information Protocol (RIP) and Open Shortest Path First (OSPE) in an IPv4 network. I. RIP uses distance vector routing II. RIP packets are sent using UDP III. OSPF packets are sent using TCP IV. OSPF operation is based on link-state routing Which of the statements above are CORRECT?
Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links. [S1] The computational overhead in link state protocols is higher than in distance vector protocols. [S2] A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol. [S3] After a topology change, a link state protocol will converge faster than a distance vector protocol. Which one of the following is correct about S1, S2, and S3?
Consider a computer network using the distance vector routing algorithm in its network layer. The partial topology of the network is as shown below. The objective is to find the shortest-cost path from the router R to routers P and Q. Assume that R does not initially know the shortest routes to P and Q. Assume that R has three neighbouring routers denoted as X, Y, and Z. During one iteration, R measures its distance to its neighbours X, Y, and Z as 3, 2, and 5, respectively. Router R gets routing vectors from its neighbours that indicate that the distance to router P from routers X, Y, and Z are 7, 6, and 5, respectively. The routing vector also indicates that the distance to router Q from routers X, Y, and Z are 4, 6, and 8, respectively. Which of the following statement(s) is/are correct with respect to the new routing table of R, after updation during this iteration ? 
Consider the following question and decide whether the statements are sufficient to answer the question. Question: In a box, there are packets of three different sizes. How many packets are there in the box? Statements: 1. Half of all the packets are of medium size. 2. There are six big packets. 3. There are twice the amount of small packets than there are big packets.
Consider the following statements:
1. The variation in an average annual range of temperature at 15° latitude of Southern Hemisphere is much less than that at 15° latitude of Northern Hemisphere.
2. At latitudes poleward of 35° the incoming radiation exceeds the outgoing radiation in. Northern Hemisphere, whereas in Southern Hemisphere the outgoing radiation exceeds the incoming radiation.
Which of the statements given above is/are correct?
The rate of various Stationery items are given below: A packet of pencils - Rs. 22.00 A packet of pen - Rs. 37.50 One eraser -  Rs. 3.50 One sharpener -  Rs. 4.50 A packet of pastel sheets -  Rs. 48.00 One ruler - Rs. 10.00 Harpreet buys one packet of pencil, two packets of pens, three erasers, one sharpener, two packets of pastel sheets and one ruler. How much would be required to pay?
The rates of various stationary items are given below: A packet of crayons - Rs. 15.50 A packet of pencils - Rs. 14.00 A packet of sketch pens - Rs. 22.50 One scissors - Rs. 17.00 One eraser - Rs. 2.00 One sheet of glazed paper - Rs. 2.50 A pack of decorative stickers - Rs. 5.00 Sohail buys one packet of crayons, two packets of pencils, one packet of sketch pens, one scissors, 5 sheets of glazed papers and one pack of decorative stickers. How much would he be required to pay?
Which two of the following are true regarding the distance-vector and link-state routing protocols?
1. Link state sends its complete routing table out all active interfaces on periodic time intervals.
2. Distance vector sends its complete routing table out all active interfaces on periodic time intervals.
3. Link state sends updates containing the state of its own links to all routers in the internetwork.
4. Distance vector sends updates containing the state of its own links to all routers in the internetwork.
Surjeet bought 48 packets of red balloons, 66 packets of blue balloons, and 35 packets of yellow balloons. Each pack contained a dozen balloons. He mixed them up and gave away 213 balloons. Then, he repacked the remainder into packets of 25 balloons each. How many packets of balloons did he repack?
Which statement is true regarding classless routing protocols?
1. The use of discontiguous networks is not allowed.
2. The use of variable length subnet masks is permitted.
3. RIPv1 is a classless routing protocol.
4. IGRP supports classless routing within the same autonomous system.
5. RIPv2 supports classless routing.