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CompTIA A+ > 2.1, 2.5, 2.6 Network Configurations > Flashcards

2.1, 2.5, 2.6 Network Configurations Flashcards

1
Q

What are the four layers of the TCP/IP model?

A

Link/Network Interface, Internet, Transport, Application.

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2
Q

What does the Link/Network Interface layer do?

A

Handles data transmission within the local network via Ethernet, WiFi, or fiber.

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3
Q

What does the Internet layer do?

A

Routes packets across WANs using IP addresses.

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4
Q

What is the role of the Transport layer?

A

Determines how data is sent using TCP or UDP.

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5
Q

What is TCP (Transmission Control Protocol)?

A

A reliable, connection-oriented protocol that ensures data delivery.

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6
Q

What is UDP (User Datagram Protocol)?

A

A faster, connectionless protocol that does not guarantee delivery.

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7
Q

What does the Application layer in the TCP/IP model include?

A

Higher-level protocols for email, file transfers, and encryption.

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8
Q

What does IPv4 stand for?

A

Internet Protocol version 4.

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9
Q

What does IPv6 stand for?

A

Internet Protocol version 6.

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10
Q

What is the purpose of DHCP (Dynamic Host Configuration Protocol)?

A

Automatically assigns dynamic IP addresses to devices.

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11
Q

What does DNS (Domain Name System) do?

A

Converts domain names (e.g., google.com) into IP addresses.

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12
Q

What is a VLAN (Virtual Local Area Network)?

A

A network segmentation method that isolates traffic within a LAN.

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13
Q

What is a VPN (Virtual Private Network)?

A

A secure tunnel that encrypts internet traffic between a device and a remote server.

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14
Q

How does TCP differ from UDP?

A

TCP is reliable and connection-oriented, while UDP is faster but does not guarantee delivery.

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15
Q

What are common use cases for TCP?

A

Web browsing, email (SMTP, IMAP), file transfers (FTP).

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16
Q

What are common use cases for UDP?

A

Streaming video, VoIP, online gaming.

17
Q

What is a gateway in networking?

A

A device that connects different networks, often a router.

18
Q

What is the purpose of a SOHO (Small Office/Home Office) router?

A

Provides internet access, assigns IPs, and manages traffic in small networks.

19
Q

What is the function of NAT (Network Address Translation)?

A

Translates private IP addresses into a public IP for internet access.

20
Q

What is the purpose of port forwarding?

A

Redirects external network traffic to a specific internal device.

21
Q

What is a subnet mask used for?

A

Defines the range of IP addresses within a subnet.

22
Q

Why is IPv6 important?

A

Provides a larger address space due to the exhaustion of IPv4 addresses.

23
Q

How does a computer get an IP address automatically?

A

Through DHCP (Dynamic Host Configuration Protocol).

CompTIA A+ (98 decks)

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