1 What is an advantage of layering in the OSI reference model?
It breaks network communications into larger parts.
It increases complexity.
It prevents changes in one layer from affecting other layers.
It requires the use of single-vendor equipment for hardware and software communications.
2 What do switches use to make switching decisions?
IP addresses
MAC addresses
Layer 1 addresses
Layer 3 addresses
3 What can be created from borrowing bits from the host portion of an IP address?
Duplicate IP addresses
Reverse IP addresses
Segments
Subnetworks
4 What is the decimal value of the binary IP address 11001101.11111111.10101010.11001101?
205.255.170.205
109.255.170.109
205.127.200.205
109.127.200.109
5 Which of the following is the approximate number of hosts supported in a Class B unsubnetted network?
254
2024
65 thousand
16 million
6 Which factor reduces throughput?
increased number of users
decreased number of users
increased size of hard drive
decreased size of hard drive
7 Which of the following are routed protocols?
AppleTalk, IP, IGRP
IP, AppleTalk, IPX
IP, RIP, IPX
IPX, OSPF, EIGRP
8 What is the Organizational Unique Identifier (OUI)?
all hex digits of a MAC address
the first 6 hex digits of a MAC address
the last 6 hex digits of a MAC address
the prefix to all network device model numbers
9 How many pins are on each of the ports of a patch panel?
4 pins
8 pins
11 pins
45 pins
10 What is the decimal value of the hex number ABE?
2750
5027
2570
7250
11 Which term refers to the amount of data that can be transmitted before receiving an acknowledgement?
window size
closed connection
two way handshake
expectational acknowledgement
12 Convert the decimal number 127 to Hex.
2B
7F
EF
1A
13 Which statement best describes wireless signals?
They are electrostatic discharge that harm computer chips or data.
They are electromagnetic waves that need optical fiber cable.
They are electromagnetic waves that need shielded or unshielded twisted pair cabling.
They are electromagnetic waves that need no physical medium and can travel through vacuum or air.
14 What is another name for a multi-port repeater?
bridge
host
hub
sequencer
15 What is an example of an application that requires both a client and server component in order to function?
web browser
Microsoft Word
ASCII
PICT
16 Which item is a characteristic of a collision domain?
all computers on a single shared access media
all computers sharing a single IP address
all computers sharing a single MAC address
all computers within a WAN
17 What is exchanged to provide communication between two hosts' source and destination OSI peer layers?
Packet datagrams
Packet data units
Protocol datagrams
Protocol data units
18 Which item correctly describes a source address?
the address of a host that receives data and information from other computers in a network
the address of a host that sends data and information to other computers in a network
data information that moves between computers in a network
it provides a connection between computers in a network
19 Which layer of the OSI model can provide a connection-oriented, reliable data transfer between two hosts?
Application
Presentation
Session
Transport
20 From the following list, what is the correct order of data encapsulation? 1. Segments 2. Bits 3. Packets 4. Frames
1-3-4-2
2-1-3-4
2-3-4-1
3-1-2-4
21 Which term describes the conversion of binary data into a form that can travel on a physical communications link?
encoding
decoding
encrypting
decrypting
22 Which layer establishes, manages, and terminates sessions between applications?
Application
Presentation
Session
Transport
23 What is the maximum number of bits that can be borrowed from the host portion of a Class C network to create subnets?
2
4
6
8
24 Which of the following best describes networking protocols?
a formal description of a set of rules and conventions that govern how devices on a network exchange information
the use of the same network topology for all networks
a set of guidelines that can be customized to meet individual needs
all of the above
25 What is a difference between the OSI model and the TCP/IP model?
The OSI model appears simpler because it has fewer layers.
The OSI model has 7 layers and the TCP/IP model has 4 layers.
The TCP/IP model combines only the presentation and session layers of the OSI model into its application layer.
The TCP/IP model combines the OSI data link and network layers into one layer.
26 Which device is characterized as both a Layer 1 and a Layer 2 device?
Fiber optic cable
Network interface card
Repeater
Unshielded twisted pair cable
27 Which of the following cable types combines the techniques of shielding, cancellation, and twisting of wires?
Fiber Optics
STP
UTP
Unshielded Twisted Pair
28 How is the number 225 represented in binary?
11001111
11011011
11110011
11100001
29 Which address does a router use to identify the source or destination network of a packet?
Ethernet address
MAC address
Network address
Node address
30 Currently, how large are IP addresses?
8 bit
16 bit
24 bit
32 bit
31 All of the following are common file formats EXCEPT.
ASCII
ASPCA
EBCDIC
JPEG
32 Which statement is true about routers?
They are passive.
They operate only at the data link layer.
They base forwarding decisions on Layer 2 addresses.
They base forwarding decisions on Layer 3 protocol addresses.
33 Why is a static route the preferred method for reaching stub networks?
static routing requires less overhead
static routing requires more overhead on the network
this allows routers to adjust to changes in the network
the routes are learned automatically
34 When running cable from the wiring closet to wall jacks, where is the cable itself labeled?
at each tie
at each end
at the jack end
at the panel end
35 Which statement best describes bridges and the way they make forwarding decisions?
they operate at OSI Layer 2 and use IP addresses to make decisions
they operate at OSI Layer 3 and use IP addresses to make decisions
they operate at OSI Layer 2 and use MAC addresses to make decisions
they operate at OSI Layer 3 and use MAC addresses to make decisions
36 Which protocol is designed to download or upload files on the Internet?
SNMP
Telnet
FTP
HTTP
37 Which of the following are measures of speed and capacity for a network?
Protocols and topology
Media and throughput
Throughput and bandwidth
Media and topology
38 Which type of protocol is used for communication between routers to maintain tables?
Non-routable
Routable
Routed
Routing
39 How many bits are in the network and subnet portion of a class B network with a subnet mask of 255.255.240.0?
18
19
20
21
40 In an Ethernet LAN, where does the horizontal cabling run normally terminate?
A decorative raceway
A ladder rack
A patch panel
The POP
41 What is a type of dialogue control that the session layer may use?
One-way alternate communication
One-way simultaneous conversation
Two-way alternate communication
Two-way asynchronous conversation
42 When sending data to a host on a different network, which address does the source host encapsulate in he IP header?
IP address of the router
MAC address of the router
MAC address of the destination device
IP address of the destination host
43 Which protocol can find the MAC address of a computer given its IP address?
RARP
DHCP
ARP
Proxy RARP
44 What is the purpose of the safety ground in a computer?
connects the hot wire to the chassis
prevents metal parts from discharging hazardous voltage through the chassis
connects the neutral wire to the chassis
prevents metal parts from becoming energized with a hazardous voltage
45 Which layer is responsible for organizing bits using framing?
Layer 1
Layer 2
Layer 3
Layer 4
46 If Acme Inc. occupies the first three floors of a building and each floor is 1500 square meters, how many wiring closets should be installed according to EIA/TIA 569?
one
three
six
nine
47 Which Ethernet wiring standard uses twisted-pair wiring?
10BASE2
10BASE5
10BASEFX
10BASE-T
48 What best describes the difference between alternating and direct current?
DC helps computers to work more efficiently, whereas AC can cause noise.
AC flows at a constant value, whereas DC rises and falls.
DC shifts ions from pole to pole, whereas AC ions run in one direction.
DC flows at a constant value, whereas AC rises and falls.