Chapter 10 Quiz

1		IGMP is a companion to the ______ protocol.
			A)	UDP
			B)	TCP
			C)	ICM
			D)	none of the above
2		IGMP is _______ protocol.
			A)	an error reporting
			B)	a group management
			C)	a transmission
			D)	none of the above
3		IGMP helps a ________ router create and update a list of loyal members related to each router interface.
			A)	broadcast
			B)	unicast
			C)	multicast
			D)	none of the above
4		IGMP operates __________.
			A)	locally
			B)	globally
			C)	both a and b
			D)	none of the above
5		An IGMP query is sent from a _______ to a _______.
			A)	host; host
			B)	host; router
			C)	router; host or router
			D)	none of the above
6		The _______ is used by a router in response to a received leave report.
			A)	general query message
			B)	special query message
			C)	membership report
			D)	none of the above
7		The least significant 23 bits in a 48-bit Ethernet address identify a ________.
			A)	multicast router
			B)	host
			C)	multicast group
			D)	none of the above
8		The _______ field of the IGMP message is all zeros in a query message.
			A)	version
			B)	type
			C)	group address
			D)	none of the above
9		The _______ field of the IGMP message is 17 for a query message.
			A)	maximum response time
			B)	type
			C)	checksum
			D)	none of the above
10		A multicast message is sent from _______ to _______.
			A)	one source; one destination
			B)	one source; multiple destinations
			C)	multiple sources; one destination
			D)	none of the above
11		In networks that do not support physical multicast addressing, multicasting can be accomplished through _______.
			A)	mapping
			B)	queries
			C)	tunneling
			D)	none of the above
12		If four hosts on a network belong to the same group, a total of _______ sent in response to a general query message.
			A)	one membership report is
			B)	two membership reports are
			C)	three membership reports are
			D)	none of the above
13		A process called _______ sends a multicast packet through WANs that do not support physical multicast addressing.
			A)	tunneling
			B)	delayed response
			C)	jamming
			D)	none of the above
14		A group table entry is in the _______ state if there is no corresponding timer running.
			A)	FREE
			B)	DELAYING
			C)	IDLE
			D)	none of the above
15		A group table entry in the _______ state sends a request when its timer expires.
			A)	FREE
			B)	DELAYING
			C)	IDLE
			D)	none of the above
16		The _______ module receives an IGMP report or query.
			A)	input
			B)	output
			C)	group-joining
			D)	none of the above
17		The _______ module sends out an IGMP report.
			A)	input
			B)	output
			C)	group-joining
			D)	none of the above
18		The _______ module can create a new entry in the group table and start a timer.
			A)	input
			B)	output
			C)	group-joining
			D)	none of the above
19		The _______ module can decrement the reference count in the group table.
			A)	input
			B)	output
			C)	group-leaving
			D)	none of the above
20		In IGMP, a membership report is sent _______.
			A)	once
			B)	twice
			C)	three times
			D)	none of the above
21		In IGMP, the general query message ___________________ group.
			A)	does not define a particular
			B)	explicitly defines a
			C)	can define more than one
			D)	none of the above
22		To prevent unnecessary traffic, IGMP uses ______________ strategy.
			A)	a quick response
			B)	an all-host response
			C)	a delayed response
			D)	none of the above
23		To prevent unnecessary traffic, IGMP designates one router as the __________ for each network.
			A)	query router
			B)	designated router
			C)	multicast router
			D)	none of the above
24		An IGMP packet is carried in an __________ packet.
			A)	UDP
			B)	IP
			C)	Ethernet frame
			D)	none of the above
25		The IP packet that carries an IGMP packet has a value of _______ in its protocol field.
			A)	3
			B)	2
			C)	1
			D)	none of the above