Question 1

What are the primary layers of the OSI model concerned with addressing and packet forwarding?

Accepted Answer

Layers 1, 2, and 3

Answer

Layers 4, 5, and 6

Answer

Layers 5, 6, and 7

Answer

Layers 2, 3, and 4

Question 2

What is the main purpose of Layer 4 transport protocols?

Accepted Answer

To provide transport services for applications

Answer

To establish physical connections

Answer

To provide routing between networks

Answer

To manage file transfers only

Question 3

Which protocol is responsible for dynamic IP address assignment?

Accepted Answer

DHCP

Answer

HTTP

Answer

DNS

Answer

NTP

Question 4

What is the primary function of DNS?

Accepted Answer

Name resolution

Answer

File sharing

Answer

Time synchronization

Answer

Load balancing

Question 5

Why is time synchronization important in networks?

Accepted Answer

To coordinate system events and logs

Answer

To improve internet speed

Answer

To reduce hardware costs

Answer

To save energy

Question 6

Which of these is NOT a common application layer service?

Accepted Answer

Physical addressing

Answer

Web services

Answer

Database services

Answer

Email services

Question 7

What type of service allows multiple servers to share the workload of incoming requests?

Accepted Answer

Load balancing

Answer

Name resolution

Answer

Print sharing

Answer

Time synchronization

Question 8

Which ports are typically used for secure web traffic?

Accepted Answer

Port 443

Answer

Port 53

Answer

Port 25

Answer

Port 21

Question 9

What service translates domain names to IP addresses?

Accepted Answer

DNS

Answer

DHCP

Answer

FTP

Answer

NTP

Question 10

Which feature helps maintain network availability if a server fails?

Accepted Answer

Redundancy

Answer

Time synchronization

Answer

Name resolution

Answer

Port scanning

Question 11

What tool would you use to check if a specific network port is open?

Accepted Answer

Port scanner

Answer

Web browser

Answer

Email client

Answer

File manager

Question 12

Which protocol synchronizes time across network devices?

Accepted Answer

NTP

Answer

DHCP

Answer

FTP

Answer

DNS

Question 13

What is a primary function of file sharing services?

Accepted Answer

Sharing resources across networks

Answer

Converting domain names

Answer

Assigning IP addresses

Answer

Managing network time

Question 14

Which service is essential for sending and receiving emails?

Accepted Answer

SMTP and POP3/IMAP

Answer

DNS only

Answer

DHCP

Answer

NTP

Question 15

What is required for implementing voice services over a network?

Accepted Answer

Quality of Service (QoS)

Answer

Only high bandwidth

Answer

Only low latency

Answer

Only redundancy

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