CCST Network Services & Protocols

Question 1

Which protocol is used to automatically assign IP addresses, subnet masks, default gateways, and DNS server addresses to network hosts?

Accepted Answer

DHCP

Answer

DHCP (Dynamic Host Configuration Protocol) automatically provides IP configuration parameters to network clients, eliminating the need for manual configuration.

Question 2

What well-known UDP port does a DHCP server use to send responses to clients?

Accepted Answer

67

Answer

DHCP servers listen on UDP port 67 and send responses to clients; clients listen on UDP port 68.

Question 3

Which DNS record type maps a fully qualified domain name (FQDN) to an IPv4 address?

Accepted Answer

A

Answer

An A (Address) record maps a hostname to a 32-bit IPv4 address, while AAAA records are used for IPv6 addresses.

Question 4

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

Accepted Answer

Translate private IP addresses to public IP addresses for Internet access

Answer

NAT translates private (RFC 1918) IP addresses used inside a network to one or more public IP addresses for communication over the Internet, conserving public IP space.

Question 5

Which protocol is used to synchronize the clocks of devices across a network?

Accepted Answer

NTP

Answer

NTP (Network Time Protocol) synchronizes clocks of networked devices to a reference time source, which is critical for accurate logging and security event correlation.

(CCST) Cisco Certified Support Technician Networking Practice Test

(CCST) Cisco Certified Support Technician Networking Practice Test

CCST Network Services & Protocols