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CS402: Saylor Direct Credit Final Exam | Saylor Academy Questions and Answers 2023
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CS402: Saylor Direct Credit Final Exam |Saylor Academy Questions and Answers 2023
___ messages are sent from one computer to the set of computers in its
logical group. - -Multicast
-Which of the following is a network that spans multiple LANs but is smaller
than a MAN?
a. CAN
b. PAN
c. TAN
d. WAN - -a. CAN
-If the physical layer delivers 1000 bits to the receiver, but the receiver only
receives 900 bits, how could you describe the behavior of the physical layer?
a. Reliable
b. Error-free
c. Unreliable
d. Compressed - -c. Unreliable
-_____ network topologies are the most expensive to implement, since they
use the most network cable. - -Mesh
-How many direct links are required to support ten nodes in a fully-
connected network topology? - -n(n-1)/2
(10)((10)-1)/2
10(9)/2
=45
-Which of the following network topologies is relatively cheap to implement,
since it uses a single wire to connect every computer in the network? - -Bus
-What is the RFC? - -A database of Internet service providers
-Which kind of protocol would you use to stream live programs when you do
not want to miss any future or present events, but you do not care as much
about missing past packets? - -UDP
-The protocols for email and web file access are described in which layer of
the Internet protocol?
a. Application
b. Network
c. Transport
d. Session - -a. Application
, -Which of the following OSI layers is responsible for routing IP packets?
a. Network
b. Presentation
c. Session
d. Transport - -a. Network
-Review this TCP packet. Which of the following sections would be different if
you were instead looking at a UDP packet? - -
-Which of the following layers is a combination of the Application,
Presentation, and Session layer in the TCP/IP reference model? - -Application
Layer
-Which of the following layers is unique to the TCP/IP reference model? - -a.
Application <- I think (?)
[not: b. Internet]
c. Transport
d. VoIP
-What type of WAN technology would you recommend for an organization
that wants to lay optical fiber cable between two cities? - -Sonet
-Which of the following types of cable would most likely be found in a public
network?
a. Coaxial
b. Optical fiber
c. Twisted pair
d. Plenum cable - -[not: a. Coaxial]
b. Optical fiber
c. Twisted pair <- I think?
d. Plenum cable
-How should you begin troubleshooting a network issue where every user is
getting a host unreachable error, which usually comes from an application-
layer protocol?
a. Update the clients' IP address settings.
b. Restart the DNS server and verify all the devices.
c. Restart the DHCP server and verify all the services.
d. Update the users' browser settings and verify them using a ping
command. - -b. Restart the DNS server and verify all the devices.
-A(n) _____ query requests the domain name that corresponds to a given IP
address. - -a. inverse
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