NWC203c – Full Actual Exam Questions and CORRECT Answers
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Course
NWC203c
Institution
NWC203c
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
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.
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.
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.
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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