CompTIA A+ 2.1 Networking - Intro to IP

A+ OBJECTIVE 2.1 NETWORKING – INTRO TO IP

1 / 25

What is the purpose of port numbers in networking?

Determining which room (application) the data is delivered to

Ensuring data is received by the correct IP address

Automatically requesting retransmission if a packet is lost

Dynamically assigning IP addresses to devices

2 / 25

What type of data does UDP prioritize due to its characteristics?

Text-based data

Time-sensitive data

Error-free data

Large file transfers

3 / 25

What feature of TCP makes it suitable for applications requiring error-free data transfer?

Faster data transfer

Connectionless nature

Reliable data transfer with error correction

Guaranteed data delivery

4 / 25

What are well-known or non-ephemeral port numbers used for?

Ensuring data is received by the correct IP address

Determining which room (application) the data is delivered to

Dynamically assigning IP addresses to devices

Automatically requesting retransmission if a packet is lost

5 / 25

What protocol is commonly used for VoIP traffic?

TCP

HTTP

UDP

SMTP

6 / 25

At which layer of the OSI model does IP operate?

Data link layer (Layer 2)

Network layer (Layer 3)

Transport layer (Layer 4)

Session layer (Layer 5)

7 / 25

How does the TCP protocol ensure accurate data delivery?

Automatically requesting retransmission if a packet is lost

Ensuring data is received by the correct IP address

Determining which room (application) the data is delivered to

Dynamically assigning IP addresses to devices

8 / 25

Which statement about port numbers is true?

They are only used for web server traffic

They range between 0 and 65,535 for both TCP and UDP

They are different for each individual website

They are designed to hide the application running on the server

9 / 25

Which protocol is used for moving application data between devices in a network?

(TCP)

(IP)

Ethernet

(UDP)

10 / 25

Why are port numbers not designed to be a security mechanism?

Because they change dramatically from one device to another

Because they complicate the process of transferring data

Because they are easily hidden from port scanners

Because they allow access to services on a device

11 / 25

What is the purpose of port numbers in networking?

To complicate the process of transferring data

To determine the appropriate port number for individual sites

To allow access to services on a particular device

To act as a security mechanism to hide applications

12 / 25

What is the purpose of DHCP in networking?

Ensuring data is received by the correct IP address

Determining which room (application) the data is delivered to

Dynamically assigning IP addresses to devices

Automatically requesting retransmission if a packet is lost

13 / 25

What are ephemeral or temporary port numbers used for?

Dynamically assigning IP addresses to devices

Ensuring data is received by the correct IP address

Automatically requesting retransmission if a packet is lost

Determining which room (application) the data is delivered to

14 / 25

What type of port number is typically used as the destination port for well-known services?

Well-known port number

Ephemeral port number

Static port number

Dynamic port number

15 / 25

What is the purpose of a source port number in data transmission?

To determine the protocol for data transmission

To identify the destination device

To complicate the process of packet routing

To identify the source device

16 / 25

Which protocol establishes and maintains a connection between two devices?

(UDP)

(IP)

(TCP)

Ethernet

17 / 25

What do DHCP, TCP, and port numbers work together to ensure?

Secure data transmission

Routing between devices in a network

Automatic retransmission of lost packets

Dynamic assignment of IP addresses

18 / 25

What is the main protocol used for web server traffic?

TCP

UDP

VoIP

HTTP

19 / 25

Which transport protocol offers reliable data transfer with data reordering, error correction, and flow control?

Ethernet

UDP

TCP

IP

20 / 25

Which protocol is used for protocols like DHCP and TFTP that do not require error-free delivery?

Ethernet

TCP

IP

UDP

21 / 25

What is the main difference between TCP and UDP?

TCP is connection-oriented while UDP is connectionless

TCP is faster than UDP

UDP guarantees data delivery

UDP is used for error-free data transfer

22 / 25

At which layer of the OSI model do TCP and UDP operate?

Network layer (Layer 3)

Transport layer (Layer 4)

Session layer (Layer 5)

Data link layer (Layer 2)

23 / 25

Which protocol is responsible for moving data between networks?

Ethernet

TCP

UDP

IP

24 / 25

What is the main difference between TCP and UDP port numbers?

UDP uses lower port numbers than TCP.

TCP and UDP use different ranges of port numbers.

TCP and UDP use the same range of port numbers.

TCP uses lower port numbers than UDP.

25 / 25

Which port number is commonly associated with email traffic?

5,004

143

3389

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CompTIA A+ 2.1 Networking – Intro to IP