Chapter 23 Quiz

1		In ATM, end devices such as routers use all _____ layers, while switches inside the ATM network use only the bottom ______layers.
			A)	two; three
			B)	three; two
			C)	one; two
			D)	none of the above
2		The only AAL used by the Internet is __________.
			A)	AAL1
			B)	ALL3/4
			C)	AAL5
			D)	none of the above
3		AAL5 is sometimes called the _________.
			A)	SAL
			B)	SEAL
			C)	SEL
			D)	none of the above
4		AAL5 accepts an IP packet of no more than 65,536 bytes and adds _________ in addition to padding.
			A)	one trailer
			B)	one header
			C)	both a and b
			D)	none of the above
5		The ________ layer provides routing, traffic management, switching, and multiplexing services.
			A)	AAL
			B)	ATM
			C)	both a and b
			D)	none of the above
6		When we use IP over ATM, only the ________ cell carries the 8-byte trailer added to the IP datagram.
			A)	last
			B)	first
			C)	both a and b
			D)	none of the above
7		When we use IP over ATM, padding can be added only to the _____ or the _______.
			A)	first cell; last cell
			B)	last two cells; last three cells
			C)	last cell; last two cells
			D)	none of the above
8		To find the physical address of the exiting-point router, ATM uses the services of _________.
			A)	ARP
			B)	IP
			C)	ATMARP
			D)	none of the above
9		The inverse request and inverse reply messages can bind the physical address to an IP address in a(n) _______ situation.
			A)	SVC
			B)	PVC
			C)	both a and b
			D)	none of the above
10		The request and reply message can be used to bind a physical address to an IP address in a(n) _______ situation.
			A)	SVC
			B)	PVC
			C)	both a and b
			D)	none of the above
11		The inverse request and inverse reply can also be used to build the server _______ table.
			A)	mapping
			B)	routing
			C)	both a and b
			D)	none of the above
12		__________ allows an ATM network to be divided into several logical subnets.
			A)	LAS
			B)	LAN
			C)	LIS
			D)	none of the above
13		A router connected to an ATM network uses the _______ layers.
			A)	AAL and ATM
			B)	AAL and physical
			C)	AAL, ATM, and physical
			D)	none of the above
14		A switch inside an ATM network uses the _______ layers.
			A)	AAL and ATM
			B)	AAL and physical
			C)	ATM and physical
			D)	none of the above
15		Which ATM layer adds an 8-byte trailer to an IP packet?
			A)	AAL5
			B)	ATM
			C)	physical
			D)	none of the above
16		Which ATM layer has a 53-byte cell as an end product?
			A)	physical
			B)	ATM
			C)	AAL5
			D)	none of the above
17		The VPI of a UNI is _______ bits in length.
			A)	8
			B)	12
			C)	16
			D)	none of the above
18		The VPI of an NNI is _______ bits in length.
			A)	8
			B)	12
			C)	16
			D)	none of the above
19		The _______ field of the ATM header provides error control.
			A)	CLP
			B)	HEC
			C)	VPC
			D)	none of the above
20		A datagram of 1010 bytes needs _______ bytes of padding.
			A)	0
			B)	38
			C)	46
			D)	48
21		A datagram of 402 bytes is divided into _______ cells.
			A)	6
			B)	7
			C)	9
			D)	none of the above
22		The maximum amount of padding that can be added is _______ bytes.
			A)	0
			B)	47
			C)	48
			D)	none of the above
23		When a _______ exists between two routers on an ATM network, an ATMARP server is not needed.
			A)	permanent virtual circuit
			B)	switched virtual circuit
			C)	logical IP subnet
			D)	none of the above
24		What is the first step in establishing a virtual connection on an ATM network?
			A)	connecting to an ATMARP server
			B)	connecting to the exiting-point router
			C)	formation of a logical IP subnet
			D)	none of the above
25		How can two routers be connected on an ATM network?
			A)	through a PVC
			B)	through an SVC
			C)	a and b
			D)	none of the above