Which of the following protocols is used to share information between routers to transport IP
Multicast packets among networks?

A.
RSVP

B.
DVMRP

C.
RPC

D.
LWAPP

Explanation:

The Distance Vector Multicast Routing Protocol (DVMRP) is used to share information between
routers to transport IP Multicast packets among networks. It uses a reverse path-flooding
technique and is used as the basis for the Internet’s multicast backbone (MBONE). In particular,
DVMRP is notorious for poor network scaling, resulting from reflooding, particularly with versions
that do not implement pruning. DVMRP’s flat unicast routing mechanism also affects its capability
to scale.
Answer option A is incorrect. The Resource Reservation Protocol (RSVP) is a Transport layer
protocol designed to reserve resources across a network for an integrated services Internet. RSVP
does not transport application data but is rather an Internet control protocol, like ICMP, IGMP, or
routing protocols. RSVP provides receiver-initiated setup of resource reservations for multicast or
unicast data flows with scaling and robustness.
RSVP can be used by either hosts or routers to request or deliver specific levels of quality of
service (QoS) for application data streams. RSVP defines how applications place reservations and
how they can leave the reserved resources once the need for them has ended. RSVP operation
will generally result in resources being reserved in each node along a path.
Answer option C is incorrect. A remote procedure call (RPC) hides the details of the network by
using the common procedure call mechanism familiar to every programmer. Like any ordinary
procedure, RPC is also synchronous and parameters are passed to it. A process of the client calls
a function on a remote server and remains suspended until it gets back the results.
Answer option D is incorrect. LWAPP (Lightweight Access Point Protocol) is a protocol used to
control multiple Wi-Fi wireless access points at once. This can reduce the amount of time spent on
configuring, monitoring, or troubleshooting a large network. This also allows network

administrators to closely analyze the network.