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NWC203c – Full Actual Exam Questions and CORRECT Answers

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NWC203c – Full Actual Exam Questions and CORRECT Answers SMTP, POP3, and IMAP protocols run on the following layer: a. None of them b. Transport layer c. Network layer d. Link layer - CORRECT ANSWER- None of them

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  • September 25, 2024
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NWC203c – Full Actual Exam Questions
and CORRECT Answers
SMTP, POP3, and IMAP protocols run on the following layer:
a.
None of them
b.
Transport layer
c.
Network layer
d.

Link layer - CORRECT ANSWER✔✔- None of them


In computer networking, hosts are sometimes divided into two categories:
a.
clients and servers
b.
Network and routers
c.
Routers and clients
d.

End-system and beginning-system - CORRECT ANSWER✔✔- clients and servers


Two types of network switching are:
a.
Circuit and packet switching
b.
X25 and Frame Relay
c.
ATM and Frame Relay

,d.

Datagram and X25 - CORRECT ANSWER✔✔- Circuit and packet switching


Which delay mainly depends on the congestion of the network?
a.
Queuing delay
b.
Transmission delay
c.
Processing delay
d.

Propagation delay - CORRECT ANSWER✔✔- Queuing delay


What is the order of the 5 layers in the Internet model?
a.
Application, transport, network, link, physical
b.
Application, network, link, physical, transport
c.
Application, transport, link, physical network,
d.

Application, transport, network, physical, link - CORRECT ANSWER✔✔- Application,
transport, network, link, physical


Vulnerability Attack, Bandwidth Flooding, and Connection Flooding belongs to
a.
Internet DoS Attack
b.
Bogus Attack
c.

,Sniffer
d.

Snoofing - CORRECT ANSWER✔✔- Internet DoS Attack


A packet of L bits is transmitted via the link with the transmission rate of R bits/sec; the
transmission delay is
a.
L/R
b.
R/L
c.
2L/R
d.

2R/L - CORRECT ANSWER✔✔- L/R


Assume that an image is about 1000 x 800 pixels with 3 bytes/pixel and it is uncompressed.
How long does it take to transmit it over a 1 Mbps channel?
a.
19.2 sec
b.
24 sec
c.
2.4 sec
d.

1.12 sec - CORRECT ANSWER✔✔- 19.2 sec


There are 4 serial links between the client and the server, with the transmission rates being
3Mbps, 12Mbps, 12 Mbps, and 2 Mbps. What is the throughput between the client and the
server?
a.
2 Mbps

, b.
1 Mbps
c.
3 Mbps
d.

12 Mbps - CORRECT ANSWER✔✔- 2 Mbps


If the router's buffer memory is empty and no other packet is currently being transmitted, then
the packet's____ will be zero
a.
Queueing delay
b.
Transmission delay
c.
Propagation delay
d.

Processing Delay - CORRECT ANSWER✔✔- Queueing delay


As soon as the browser receives the IP address from____, it can initiate a TCP connection to
the HTTP server located at port_____ at that IP address
a.
DNS... 80
b.
FTP... 20
c.
User...80
d.

Client...60 - CORRECT ANSWER✔✔- DNS... 80


In the file distribution of the client-server model, the server has to send ____ of file to many
hosts, consuming (tiêu thụ) a large amount of_____

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