Network Services & Protocols Flashcards

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

Answer: DHCP

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

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

Answer: 67

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

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

Answer: A

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

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

Answer: Translate private IP addresses to public IP addresses for Internet access

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.

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

Answer: NTP

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

What is a DHCP lease?

Answer: A temporary IP address assignment for a specified period of time

A DHCP lease is the amount of time a client is allowed to use an IP address assigned by the DHCP server before it must renew or release the address.

Which DNS record type specifies the mail server responsible for accepting email for a domain?

Answer: MX

MX (Mail Exchanger) records identify the mail servers that accept incoming email for a domain and their relative priority.