WGU C172 Network and security Chapter 1 & 2 Key Exam Guide Questions and Integral Marking Scheme version 2024/2025
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WGU C172 Network & Security
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WGU C172 Network & Security
WGU C172 Network and security Chapter 1 & 2 Key Exam Guide Questions and Integral Marking Scheme version 2024/2025
This layer of the OSI model provides the electrical and mechanical connection to the network. - correct answer 1. Physical layer
This layer of the OSI model handles error recovery,...
WGU C172 Network and security Chapter 1 &
2 Key Exam Guide Questions and Integral
Marking Scheme version 2024/2025
This layer of the OSI model provides the electrical and mechanical connection to the
network. - correct answer 1. Physical layer
This layer of the OSI model handles error recovery, flow control, and sequencing. -
correct answer 2. Data link layer
MAC is defined on this layer of the OSI model. - correct answer 2. Data link layer
This layer of the OSI model accepts outgoing messages and combines messages or
segments into packets, adding a header that includes routing information. - correct
answer 3. Network layer
This layer of the OSI model is concerned with message integrity between source and
destination. - correct answer 4. Transport layer
IP and IPX are layer _____ protocols. - correct answer 3. Network layer
TCP and UDP are layer _____ protocols. - correct answer 4. Transport layer
This layer of the OSI model provides the control functions necessary to establish,
manage, and terminate the connections as required to satisfy the user request. -
correct answer 5. Session layer
NFS and SQL are layer ____ technologies. - correct answer 5. Session layer
This layer of the OSI model accepts and structures the messages for the application. -
correct answer 6. Presentation layer
,ASCII and JPEG are examples of layer ____ technologies. - correct answer 6.
Presentation layer
This layer of the OSI model interacts with applications programs that incorporate a
communication component such as your Internet browser and email. - correct answer
7. Application layer
HTTP, FTP, and SMTP are examples of layer ____ technologies. - correct answer 7.
Application
Ping is tool for test layer ____ functionality. - correct answer 3. Network layer
CSMA/CD - correct answer carrier sense multiple access with collision detection. This
is the Ethernet LAN media-access method.
What is the most popular example of a CSMA/CD protocol? - correct answer Ethernet
The information in an Ethernet network is exchanged in a _____________ format. -
correct answer frame
Frame - correct answer a grouping of information for transmission that includes the
header, data and trailer
MAC stands for ... - correct answer media access control
A MAC address is composed of __________ __________ digits - correct answer 12
hexadecimal
A MAC address is ________ bytes. - correct answer 6
,The first 6 digits of a MAC address is called the.... - correct answer OUI -
organizationally unique identifier
IANA - correct answer Internet Assigned Numbers Authority - an agency that assigns
IP addresses to computer networks and makes sure that no two different networks are
assigned the same IP network address
What is the maximum number of hosts in a class A network? - correct answer 2^24
(16,777,214)
What is the maximum number of hosts in a class B network? - correct answer 2^16
(65,534)
What is the maximum number of hosts in a class C network? - correct answer 2^8
(254)
What is the address range for class A networks? - correct answer 0.0.0.0 to
126.255.255.255
What is the address range for class B networks? - correct answer 128.0.0.0 to
191.255.255.255
What is the address range for class C networks? - correct answer 192.0.0.0 to
223.255.255.255
What is the address range for class D networks? - correct answer 224.0.0.0 to
239.255.255.255
This network class is reserved for multicast groups. - correct answer Class D
This network class is used for midsize companies and universities. - correct answer
Class B
, This network class is used for governments and very large networks. - correct answer
Class A
This network class is used for small networks. - correct answer Class C
What is the maximum range and speed of 802.11a? - correct answer 54Mbps with an
operating range of 75 feet
What is the maximum range and speed of 802.11b? - correct answer a range of 100-
150 feet and 11Mbps
Which wireless technologies operate at 5ghz? - correct answer 802.11a
802.11n
802.11ac
Which wireless technologies operate at 2.4ghz? - correct answer 802.11b
802.11g
802.11n
What are the steps for troubleshooting wired or wireless home networks? - correct
answer 1.) Check lights on device.
2.) Reboot host computer and router.
3.) Verify cables are properly connected and/or computers are connected to wireless
networks.
4.) Verify network settings.
What steps can be taken to secure a home network? - correct answer 1.) Change the
default factory passwords.
2.) Change the default SSID.
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