CS402: Saylor Direct Credit Final Exam | Saylor Academy Questions and Answers Best rated A+ Guaranteed Success Latest Update

CS402: Saylor Direct Credit Final Exam |
Saylor Academy

___ messages are sent from one computer to the set of computers in its logical group. -
CORRECT ANSWER: 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 - CORRECT ANSWER: 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 - CORRECT ANSWER: c. Unreliable

_____ network topologies are the most expensive to implement, since they use the most
network cable. - CORRECT ANSWER: Mesh

How many direct links are required to support ten nodes in a fully-connected network
topology? - CORRECT ANSWER: n(n-1)/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? - CORRECT ANSWER: Bus

What is the RFC? - CORRECT ANSWER: 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?
- CORRECT ANSWER: 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 - CORRECT ANSWER: a. Application

, Which of the following OSI layers is responsible for routing IP packets?
a. Network
b. Presentation
c. Session
d. Transport - CORRECT ANSWER: a. Network

Review this TCP packet. Which of the following sections would be different if you were
instead looking at a UDP packet? - CORRECT ANSWER: (Not answered)

Which of the following layers is a combination of the Application, Presentation, and
Session layer in the TCP/IP reference model? - CORRECT ANSWER: Application Layer

Which of the following layers is unique to the TCP/IP reference model? - CORRECT
ANSWER: a. Application (uncertain, but accepted)

What type of WAN technology would you recommend for an organization that wants to lay
optical fiber cable between two cities? - CORRECT ANSWER: 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 - CORRECT ANSWER: b. Optical fiber (Twisted pair possible in some
cases, but Optical Fiber is best here)

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. - CORRECT
ANSWER: b. Restart the DNS server and verify all the devices.

A(n) _____ query requests the domain name that corresponds to a given IP address. -
CORRECT ANSWER: a. inverse

You are managing a website for a tech firm, and you notice that dnsserver1 and dnsserver2
cannot communicate properly across the company's WAN. What is the first step you
should take when trying to solve this problem?
a. Restart the DNS server.
b. Create a DNS server backup.
c. Update the DNS server's IP address.
d. Verify the IP address for both of the servers. - CORRECT ANSWER: d. Verify the IP
address

A MIME message must - CORRECT ANSWER: allow audio/video transmissions.