Chapter 19 Quiz

1		_______ is the standard mechanism provided by TCP/IP for copying a file from one host to another.
			A)	TELNET
			B)	SMTP
			C)	TFTP
			D)	none of the above
2		FTP uses the services of ________.
			A)	UDP
			B)	IP
			C)	TCP
			D)	none of the above
3		In FTP, the well-known port ____ is used for the control connection and the well-known port ________ for the data connection.
			A)	21; 22
			B)	21; 20
			C)	20; 21
			D)	none of the above
4		In FTP, _______ is the service type used by the IP protocol because this is an interactive connection between a user (human) and a server.
			A)	maximize throughput
			B)	minimize delay
			C)	minimize error
			D)	none of the above
5		For control connection, FTP uses the __________ character set
			A)	regular ASCII
			B)	EBCDIC
			C)	NVT ASCII
			D)	none of the above
6		During an FTP session the control connection is opened _______.
			A)	exactly once
			B)	exactly twice
			C)	as many times as necessary
			D)	none of the above
7		During an FTP session the data connection is opened _______.
			A)	exactly once
			B)	exactly twice
			C)	as many times as necessary
			D)	none of the above
8		In FTP, a file can be organized into records, pages, or a stream of bytes. These are types of an attribute called _______.
			A)	file types
			B)	data structures
			C)	transmission modes
			D)	none of the above
9		In FTP, there are three types of _______: stream, block, and compressed.
			A)	file types
			B)	data structures
			C)	transmission modes
			D)	none of the above
10		In FTP, ASCII, EBCDIC, and image define an attribute called _______.
			A)	file type
			B)	data structure
			C)	transmission mode
			D)	none of the above
11		In FTP, which category of commands is used to store and retrieve files?
			A)	file transfer commands
			B)	access commands
			C)	file management commands
			D)	none of the above
12		In FTP, which category of commands defines the port number for the data connection on the client site?
			A)	file transfer commands
			B)	access commands
			C)	port defining commands
			D)	none of the above
13		In FTP, which category of commands sets the attributes (file type, data structure, and transmission modes) of a file to be transferred?
			A)	file transfer commands
			B)	access commands
			C)	data formatting commands
			D)	none of the above
14		In FTP, which category of commands lets a user switch directories and create or delete directories?
			A)	file transfer commands
			B)	access commands
			C)	file management commands
			D)	none of the above
15		In FTP, when we _______, it is copied from the server to the client.
			A)	retrieve a file
			B)	retrieve a list
			C)	a and c
			D)	none of the above
16		In FTP, when we _______, it is copied from the client to the server.
			A)	retrieve a file
			B)	store a file
			C)	retrieve a list
			D)	none of the above
17		TFTP uses the services of ________.
			A)	TCP
			B)	UDP
			C)	IP
			D)	none of the above
18		In TFTP, what type of message is sent in response to an RRQ that fails to establish a connection?
			A)	WRQ
			B)	DATA
			C)	ERROR
			D)	none of the above
19		In TFTP, what type of message is sent to establish a connection to retrieve a file?
			A)	RRQ
			B)	WRQ
			C)	DATA
			D)	none of the above
20		In TFTP, which type of message is always a set number of bytes?
			A)	RRQ
			B)	WRQ
			C)	ACK
			D)	none of the above
21		In TFTP, A DATA block is sent in response to a _______ message.
			A)	RRQ
			B)	ACK
			C)	a or b
			D)	none of the above
22		In TFTP, a connection is terminated with a _______ block.
			A)	DATA
			B)	ACK
			C)	ERROR
			D)	none of the above
23		An unauthorized user tries to send a file to a server using TFTP. What should be the response of the server?
			A)	ACK
			B)	ERROR
			C)	DATA
			D)	none of the above
24		In TFTP, the block number on a DATA message is 22. This always means _______.
			A)	there were 21 previous blocks
			B)	there were 20 previous blocks
			C)	this is the last block
			D)	none of the above
25		Which TFTP message contains a block number field?
			A)	DATA
			B)	ACK
			C)	a and b
			D)	none of the above
26		In TFTP, connection termination is signaled by a DATA message with _______ bytes.
			A)	any positive number of
			B)	512
			C)	0 to 511
			D)	all of the above
27		The flow-control mechanism in TFTP _______.
			A)	requires an ACK for every DATA message
			B)	is called sliding window
			C)	is nonexistent
			D)	none of the above
28		In TFTP, if a message is _______, it is resent.
			A)	damaged
			B)	lost
			C)	a and b
			D)	none of the above
29		In TFTP, if a duplicate DATA message is received, _______.
			A)	the sender sends an error message
			B)	the connection is terminated
			C)	the receiver discards the duplicate
			D)	none of the above
30		In TFTP, one symptom of the sorcererís apprentice bug is that _______.
			A)	ACKS are duplicated
			B)	DATA messages are duplicated
			C)	a and b
			D)	none of the above