CIW Internet Protocols & Network Foundations 2

Question 1

Which DNS record type maps a hostname to an IPv4 address?

Accepted Answer

A

Answer

An A (Address) record directly maps a domain name to a 32-bit IPv4 address.

Question 2

What is the default port used by SMTP for email submission?

Accepted Answer

25

Answer

SMTP uses port 25 as its well-known port for server-to-server mail transfer and traditional mail submission.

Question 3

What is the key functional difference between POP3 and IMAP email protocols?

Accepted Answer

IMAP keeps messages on the server and syncs state; POP3 downloads and typically deletes them locally

Answer

IMAP synchronizes messages across multiple devices while leaving them on the server; POP3 downloads messages to one client and usually removes them from the server.

Question 4

Which DNS record type specifies the authoritative mail servers for a domain?

Accepted Answer

MX

Answer

An MX (Mail Exchanger) record identifies the mail servers responsible for accepting email on behalf of a domain.

Question 5

What is a DNS TTL (Time to Live) value used for?

Accepted Answer

The duration a DNS record can be cached by resolvers before being refreshed

Answer

TTL tells caching resolvers how many seconds to store a DNS record before querying the authoritative server again for a fresh copy.

CIW Certified Internet Web Professional Practice Practice Test

CIW Certified Internet Web Professional Practice Practice Test

CIW Internet Protocols & Network Foundations 2