B227 Data Communications
Quiz 3 2001
Directions
You are required to place you answers on a computer readable answer
sheet. Hand your completed sheet in at the end of the quiz.
Remember! Place your name and student No. on the answer sheet.
KEEP YOUR EYES ON YOUR OWN PAPER!!!
1. Which of the following is not an internetworking device'?
a. bridge
b. gateway
c. router
d. all of them are
2. Which of the following uses the greatest number of layers in the OSI model?
a. bridge
b. repeater
c. router
d. gateway
3. A bridge forwards or filters a packet by comparing the information in its address,
table to the packet's
.
a. layer 2 source address
b. source node's physical address
c. layer 2 destination address
d. layer 3 destination address
4. A simple bridge does which of the following?
a. filters a data packet
b. forwards a data packet
c. extends LANs
d. all of the above
5. The shortest path in routing can refer to
a. the least expensive path
b. the least distant path
c. the path with the smallest number of hops
d. any or a combination of the above
.
6. Which routing algorithm requires more traffic between routers for setup and
updating?
a. distance vector
b. link state
c. Dijkstra
d. vector link
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B227 Data Communications
Quiz 3 2001
7. In distance vector routing, each router receives vectors from
a. every router in the network
b. every router less than two units away
c. a table stored by the software
d. its neighbors only
8. In link state routing, flooding allows changes to be recorded by
a. all routers
b. neighbor routers only
c. some routers
d. all networks
9. In an LSP, the advertiser is
a. a router
b. a network
c. a data packet
d. none of the above
.
10. Which of the following can be handled by a gateway?
a. protocol conversion
b. packet reslzing
c. data encapsulation
d. a and b
11. Gateways function in which OSI layers?
a. the lower three
b. the upper four
c. all seven
d. all but the physical layer
12. Repeaters function in the
a. physical
b. data link
c. network
d. a and b
13. Bridges function in the
a. physical
b. data link
c. network
d. a and b
layer(s).
layer(s).
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.
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B227 Data Communications
Quiz 3 2001
14. What type of bridge must have its address table entered manually?
a. simple
b. transparent
c. multiport
d. b and c
15. Which type of bridge builds and updates its tables from address information on
packets?
a. simple
b. transparent
c. a and b
d. none of the above
16. Routers function in the
layers.
a. physical and data link
b.
physical, data link, and network
c. data link and network
d.
network and transport
17. In which routing method do all the routers have a common database?
a. distance vector
b. link state
c. link vector
d. none of the above
18. The transport layer performs the same types of functions as the
a. session
b, network
c. data link
d. physical
19. End-to-end delivery is the movement of a message from
a. one station to the next station
b. one network to the next network
c. source to destination
d. none of the above
20. What type of addressing is specifically used by the transport layer?
a. station addresses
b. network addresses
c. application program port addresses
d. dialog addresses
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B227 Data Communications
Quiz 3 2001
21. Error control is needed at the transport layer because of potential errors occurring .
a. from transmission line noise
b. in routers
c. from out-of-sequence delivery
d. from packet losses
22. Making sure that data segments arrive in the correct order is
a. error
b. sequence
c. loss
d. duplication
control.
23. Making sure that all the data packets of a message are delivered to the destination
is
control.
a. error
b. sequence
c. loss
d. duplication
24. In
a.
b.
c.
d.
25. In
a.
b.
c.
d.
services, connections must be established and terminated.
connectionless
connection-oriented
segmentation
none of the above
services, no connection establishment is needed.
connectionless
connection-oriented
segmentation
none of the above
26. A virtual circuit is associated with a
a. connectionless
b. connection-oriented
c. segmentation
d. none of the above
service.
27. In
services, packets of a single transmission travel from source to destination via
different paths.
a. connectionless
b. connection-oriented
c. segmentation
d. none of the above
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Quiz 3 2001
28. Which OSI layer corresponds to the IP layer?
a. physical
b. data link
c. network
d. transport
29. Which OSI layer(s) correspond to TCPIIP's application layer?
a. application
b. presentation
c. session
d. all of the above
30. This transport layer protocol requires acknowledgment.
a. UDP
b. TCP
c. FTP
d. NVT
31.
can request a service.
a. A socket interface
b. A port
c. A client
d. A server
32. The client program is
a. active
b. passive
c. finite
d. infinite
because it terminates after it has been served.
33. The server program is
a. active
b. passive
c. finite
d. infinite
because it is always available, waiting for a request.
34.The TCP/IP application layer corresponds to the OSI model's
a. physical, data link, and network
b. transport and network
c. session and transport
d. session, presentation, and application
35. To find the IP address of a host when the domain name is known, the
a. inverse domain
b. generic domains
c. country domains
d. b or c
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layers.
can be used.
B227 Data Communications
36.. Remote login can involve
a. NVT
B.TELNET
c. TCP/IP
d. all of the above
Quiz 3 2001
.
37. The
at the remote site sends received characters to the operating system.
a. terminal driver
b. pseudoterminal driver
c. TELNET client
d. TELNET server
38. The
a.
b.
c.
d.
translates local characters into NVT form.
terminal driver
pseudoterminal driver
TELNET client
TELNET server
39. The
a.
b.
c.
d.
translates NVT characters into a form acceptable by the operating system.
terminal driver
pseudoterminal driver
TELNET client
TELNET server
40. Which of the following is true?
a. FTP allows systems with different directory structures to transfer files.
b. FTP allows a system using ASCII and a system using EBCDIC to transfer files.
c. FTP allows a PC and a SUN workstation to transfer files.
d. all of the above
41. During an FTP session, the control connection is opened
a. exactly once
b. exactly twice
c. as many times as necessary
d. all of the above
.
42.The purpose of the MTA is
.
a. message preparation
b. envelope creation
c. transferal of messages across the Intemet
d. a and b
43. When a message is sent using SMTP,
a. only one
b. only two
c. only three
d. at least two
UA(s) are involved.
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Quiz 3 2001
44. E-mail cannot be sent
.
a. if the sending site does not use TCP/IP
b. if the receiving site does not use TCP/IP
c. through private networks
d. none of the above
45. A
a.
b.
c.
d.
can transform non-SMTP mail to SMTP format and vice versa.
mail spool
mail gateway
mail file
mail exchanger
46. MIME allows
data to be sent through SMTP.
a. audio
b. non-ASCII data
c. image
d. all of the above
47. Which of the following is associated with SNMP?
a. MIB
b. SMI
c. BER
d. all of the above
48.
a.
b.
c.
d.
49.
runs the SNMP client program;
A manager; a manager
An agent; an agent
A manager; an agent
An agent; a manager
runs the SNMP server program.
names objects, defines the type of data that can be stored in an object, and
encodes data for network transmission.
a. MIB
b. SMI
c. SNMP
d. ASN.1
50. Which of the following is a collection of objects to be managed?
a. MIB
b. SMI
c. SNMP
d. ASN.1
51. An SNMP agent can send
a. GetRequest
b. SetRequest
c. GetNextRequest
d. Trap
messages.
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B227 Data Communications
52. An SNMP manager can send
a. GetRequest
b. SetRequest
c. GetNextRequest
d. all of the above
53. An SNMP agent can send
a. GetResponse
b. GetRequest
c. SetRequest
d. GetNextRequest
54. HTTP has similarities to both
a. FTP; SNMP
b. FTP; SMTP
c. FTP; MTV
d. FTP; URL
Quiz 3 2001
messages.
messages.
and
.
55. What does the URL need to access a document?
a. pathname
b. host computer
c. retrieval method
d. all of the above
56. Which of the following is a retrieval method?
a. HTTP
b. FTP
c.TELNET
d. all of the above
57. Hypertext documents are linked through
a. DNS
b.TELNET
c. pointers
d. homepages
58. Which of the following is not an interpreter?
a. HTTP
b. HTML
c. CGI
d. Java
End of Quiz
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