CCST Network Protocols and Services 2

Question 1

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

Accepted Answer

Maps private internal IP addresses to a public IP address for internet access

Answer

NAT translates private RFC 1918 addresses used inside a network to a public IP address when communicating with the internet, conserving public address space.

Question 2

Which file transfer protocol uses TCP port 21 for control and TCP port 20 for data transfer in active mode?

Accepted Answer

FTP

Answer

FTP (File Transfer Protocol) uses port 21 for the control connection and port 20 for the data connection in active mode.

Question 3

A technician needs to transfer a router's IOS image using a lightweight protocol that requires no authentication and uses UDP. Which protocol should they use?

Accepted Answer

TFTP

Answer

TFTP (Trivial File Transfer Protocol) uses UDP port 69 and provides simple, unauthenticated file transfers, commonly used for IOS images and config files.

Question 4

Which protocol synchronizes the clocks of networked devices and uses UDP port 123?

Accepted Answer

NTP

Answer

NTP (Network Time Protocol) uses UDP port 123 to synchronize device clocks across a network to a common time source.

Question 5

What does the acronym VLAN stand for, and what is its primary purpose?

Accepted Answer

Virtual LAN — logically segments a physical network into separate broadcast domains

Answer

A VLAN (Virtual LAN) logically divides a physical switch into multiple isolated broadcast domains, improving security and traffic management.

(CCST) Cisco Certified Support Technician Practice Test

(CCST) Cisco Certified Support Technician Practice Test

CCST Network Protocols and Services 2