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WGU C172 Network and Security Foundations Exam 416 Questions with Verified Answers ,100% CORRECT
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WGU C172 Network and Security Foundations Exam 416 Questions with Verified Answers
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WGU C172 Network and Security Foundations Exam 416Questions with Verified Answers
Protocol - CORRECT ANSWER The set of rules established for users to exchange
information
topology - CORRECT ANSWER The network architecture used to interconnect the
networking equipment
deterministic network - CORRECT ANSWER Each station connected to the network
is ensured access for transmission of its messages at regular or fixed time
intervals
bus topology - CORRECT ANSWER The computers share the media (coaxial cable)
for data transmission
ThinNet - CORRECT ANSWER The coaxial cable used in a bus network.
star topology - CORRECT ANSWER Twisted-pair cables connect the devices to a
central hub or switch
hub - CORRECT ANSWER A multiport repeater device used at the center of a star
topology
multiport repeater - CORRECT ANSWER The data it receives is broadcast and seen
by all devices connected to its ports. A hub.
broadcast - CORRECT ANSWER Transmission of data by a hub to all devices
connected to its ports
switch - CORRECT ANSWER Device used at the center of a star topology that
forwards a frame it receives directly out the port associated with its destination
address
,mesh topology - CORRECT ANSWER All networking devices are directly connected
to each other, allows for full redundancy
OSI model - CORRECT ANSWER The seven layers describing network functions
Physical layer - CORRECT ANSWER Provides the electrical and mechanical
connection to the network (cabling, NICs). 1st OSI layer
Data link layer - CORRECT ANSWER Handles error recovery, flow control
(synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer
Network layer - CORRECT ANSWER Accepts outgoing messages and combines
messages or segments into packets, adding a header that includes routing
information (IP, IPX). 3rd OSI layer
Transport layer - CORRECT ANSWER Concerned with message integrity between
source and destination (TCP, UDP). 4th OSI layer
Session layer - CORRECT ANSWER Provides the control functions necessary to
establish, manage, and terminate the connections (NSF, SQL). 5th OSI layer
Presentation layer - CORRECT ANSWER Accepts and structures the messages for
the application (ASCII, JPEG). 6th OSI layer
Application layer - CORRECT ANSWER Interacts with application programs that
incorporate a communication component such as your Internet browser and
email (HTTP, FTP, SMTP). 7th OSI layer
3 basic steps to isolate network problem - CORRECT ANSWER Is the connection to
the machine down? (layer 1)
Is the network down? (layer 3)
Is a service on a specific machine down? (layer 7)
CSMA/CD - CORRECT ANSWER The Ethernet LAN media-access method, carrier
sense multiple access with collision detection
, Ethernet - CORRECT ANSWER LAN protocol created in 1972 and standardized in
1980 using CSMA/CD.
Frame - CORRECT ANSWER Contains the header, data, and trailer (the padding
and 4-byte CRC frame check sequence)
Frame header - CORRECT ANSWER Consists of the preamble, start frame
delimiter, destination and source addresses, and length/type field
64 bytes - CORRECT ANSWER Minimum length of an Ethernet frame
1518 bytes - CORRECT ANSWER Maximum length of an Ethernet frame
MAC address - CORRECT ANSWER A unique 6-byte/48-bit address assigned by the
vendor of the network interface card displayed in 12 hex digits
Organizationally unique identifier (OUI) - CORRECT ANSWER The first 3 bytes of
the MAC address that identifies the manufacturer of the network hardware
ipconfig /all - CORRECT ANSWER Enables the MAC address information to be
displayed from the command prompt
IANA - CORRECT ANSWER The agency that assigns IP addresses to computer
networks
IP address - CORRECT ANSWER Unique 32-bit address that identifies on which
network the computer is located as well as differentiates the computer from all
other devices on the same network
Class A networks - CORRECT ANSWER Governments, very large networks. Range
from 0.0.0.0 to 126.255.255.255. Example: 44.x.x.x
Class B networks - CORRECT ANSWER Midsize companies, universities, and so on.
Range from 128.0.0.0 to 191.255.255.255. Example: 128.123.x.x
Class C networks - CORRECT ANSWER Small networks. Range from 192.0.0.0 to
223.255.255.255 Example: 192.168.1.x
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