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Indicate whether the statement is true or false.
1. For each network reference model layer, the software handles packages of data, which are called packet
defined units.
a.
True
b.
False
2. The entire IPv6 address space is now occupied.
a.
True
b.
False
3. The Session layer is equipped to request retransmission of all erroneous or missing PDUs when reassembly is
underway, so that it can guarantee reliable delivery of data from sender to receiver.
a.
True
b.
False
4. The original ARPANET was a packet-switched network.
a.
True
b.
False
5. A divide and conquer approach permits concerns related to networking hardware to be completely separated
from those related to networking software.
a.
True
b.
False
Indicate the answer choice that best completes the statement or answers the question.
6. Which of the following is a task handled at the Network layer?
a.
recognizes and uses multiple routes
b.
manages point-to-point transmission across the networking medium
c.
ensures reliable end-to-end transmission of PDUs
d.
maintains ongoing communications between a sender and a receiver
7. What does TCP/IP use to identify Application-layer protocols?
a.
port numbers
b.
protocol numbers
c.
frame values
d.
datagram IDs
8. Which part of a PDU is most likely to provide data integrity checks for the data portion of the PDU?
a.
frame identifier
b.
trailer
c.
sequence number
d.
port field
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9. In which layer are notions of network location addressed and the intricacies of directing a PDU from sender
to receiver handled?
a.
Data Link layer
b.
Application layer
c.
Network layer
d.
Transport layer
10. What are TCP/IP application processes such as FTP and SMTP sometimes called?
a.
link layer protocols
b.
network hosts
c.
network services
d.
protocol IDs
11. Which layer manages the way data is presented to the network (on its way down the protocol stack), and to a
specific machine/application combination (on its way up the protocol stack)?
a.
Session
b.
Physical
c.
Network
d.
Presentation
12. Which layer includes the physical transmission medium (cables or wireless media) that any network must
use to send and receive the signals that constitute the physical expression of networked communications?
a.
Data Link
b.
Physical
c.
Network
d.
Transport
13. Which layer of the OSI model works with frames?
a.
Data Link
b.
Physical
c.
Network
d.
Presentation
14. Which of the following is a TCP/IP model Network Access layer protocol?
a.
TCP
b.
UDP
c.
HDLC
d.
DHCP
15. In which layer are ongoing communications between a sender and a receiver set up, maintained, and then
terminated, or torn down, as needed?
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a.
Session layer
b.
Physical layer
c.
Network layer
d.
Presentation layer
16. Which layer defines an interface that applications can use to request network services, rather than referring
directly to applications themselves?
a.
Application layer
b.
Physical layer
c.
Session layer
d.
Presentation layer
17. Which process taps into the network communications system and captures packets that cross the network?
a.
Payload identification
b.
Multiplexing/Demultiplexing
c.
PDU Encapsulation
d.
Protocol analysis
18. What do most analyzers have that indicate unusual network events or errors?
a.
ports
b.
alarms
c.
sockets
d.
sessions
19. Which of the following is a TCP/IP model Transport layer protocol?
a.
IP
b.
Frame Relay
c.
DNS
d.
TCP
20. What are applied to the packets that are captured into the trace buffer so you can see the packets in a
readable format?
a.
Ports
b.
Runts
c.
Filters
d.
Decodes
21. Which organization is responsible for creating and managing RFCs, in which the rules and formats for all
related protocols and services are described?
a.
ICANN
b.
Internet Engineering Task Force
c.
Internet Architecture Board
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d.
Internet Society
22. Which OSI model layer handles the conversion of outgoing data from bits that computers use in the signals
that networks use?
a.
Data Link
b.
Physical
c.
Network
d.
Presentation
23. Which element of a protocol analyzer is required to capture unicast packets sent to other devices?
a.
promiscuous mode
b.
packet filter
c.
trace buffer
d.
decoder
24. What does RMON use to collect traffic data at a remote switch and send the data to a management device?
a.
Simple Network Management Protocol
b.
User Datagram Protocol
c.
Virtual Private Network
d.
Wide Area Information Service
25. Which layer enables reliable transmission of data through the Physical layer at the sending end, and checks
such reliability upon reception at the receiving end?
a.
Data Link layer
b.
Physical layer
c.
Network layer
d.
Presentation layer
26. Which term refers to a single logical network composed of multiple physical networks, which may all be at
a single physical location, or spread among multiple physical locations?
a.
internetwork
b.
session
c.
connection-oriented
d.
checksum
Enter the appropriate word(s) to complete the statement.
27. The most important TCP/IP Network Access layer protocol is ____________________.
28. ____________________ involves cutting up a big message into a numbered sequence of chunks, called
segments, in which each chunk represents the maximum data payload that the network media can carry between
sender and receiver.
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29. The Session layer includes mechanisms to maintain reliable ongoing conversations, called
____________________.
30. The primary function of the ____________________ layer is to provide a globally unique address to every
host on the Internet and paths to and from hosts.
31. The ____________________ layer also coordinates the sending and receiving of signals across the
networking medium, and determines what kinds of cables, connectors, and network interfaces must be used to
access a specific area on a network.
Match each item with a statement below.
a.
Alarm
b.
Anycast packet
c.
Checkpoint
d.
Data link layer
e.
Frame
f.
Packet
g.
Runt
h.
Datagram
i.
Host
32. notification of events or errors on the network
33. an IPv6 multicast method that permits multiple recipients to be designated for a single message
34. a point in time at which all system state and information is captured and saved
35. manages point-to-point transmission across the networking medium, from one computer to another on a
single logical or physical cable segment
36. Data Link layer PDU
37. the PDU associated with the Network layer
38. undersized packet
39. PDU at the TCP/IP Network Access Layer
40. device that operate on the Internet
41. What is the purpose of the following protocols: Internet Protocol, Internet Control Message Protocol, and
Address Resolution Protocol.
42. List five basic elements found on most protocol analyzers.
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43. What is the difference between the Open Shortest Path First protocol and the Border Gateway Protocol?
44. The reference model described in ISO Standard 7498 breaks network communication into seven layers. List
each layer from top to bottom.
45. What is the purpose of the Internet Architecture Board?
46. Provide brief descriptions of the following protocols: High-level Data Link Control (HDLC) protocol and
frame relay.
47. What is the purpose of the Internet Engineering Task Force (IETF)?
48. Briefly discuss two elements that TCP/IP services depend on to operate.
49. Briefly describe the three primary tasks that the Internet layer handles for TCP/IP.
50. Briefly describe three options for analyzing switched networks.
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Answer Key
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