Internetworking I - Routing Protocols

RIPv2, EIGRP, and OSPF are routing protocols that support variable length subnet masking. Variable length subnet masking (VLSM) allows for the division of IP addresses into smaller subnets, which can vary in size. RIPv1 does not support VLSM, as it only allows for the use of classful subnet masks. However, RIPv2, EIGRP, and OSPF all support VLSM, enabling more efficient use of IP addresses and better network scalability.

The statement is false because the problem of Counting to Infinity does not cause packets to loop around the network. Counting to Infinity is a routing problem in computer networks where routers continuously exchange information about network paths. It occurs when a router incorrectly believes that a particular route is the shortest path to a destination, leading to a loop in the network. However, this problem does not cause packets to physically loop around the network.

Link state routing protocols do not consume more CPU and memory than distance vector routing protocols. In fact, it is the opposite. Distance vector routing protocols, such as RIP, require routers to periodically send their entire routing tables to their neighbors, which can consume significant network bandwidth and processing power. On the other hand, link state routing protocols, such as OSPF, only send updates when there is a change in the network topology. This makes link state routing protocols more efficient in terms of CPU and memory usage, allowing for greater scalability. Therefore, the correct answer is False.

LSAs, or Link State Advertisements, are used in routing protocols to exchange information about network topology. The two primary types of LSAs are routers and links. Routers advertise their own information, such as their interfaces and network addresses, through router LSAs. On the other hand, link LSAs are used to advertise the state and cost of individual links in the network. These LSAs provide crucial information for routers to build and maintain accurate routing tables, allowing for efficient packet forwarding. Therefore, the correct answer is Router and Link.