Quiz 6

Question 1

Which of the following describes the relationship of a DNS ‘A’ record versus a ‘Pointer’ record?

Answer 1

The Address ‘A’ record has the reverse function of a Pointer Record.
The ‘A’ address type match FQDN’s to their IP Address. The Point record matches IP Addresses to their FQDN’s.

Question 2

What is a DNS MX record?

Answer 2

A record for email servers
A mail exchange record (that is, MX record) maps a domain name to an e-mail (or message transfer agent) server for that domain.

Question 3

An administrator suspects an employee is bypassing policy to visit unauthorized websites during work hours. Besides consulting a proxy service, which of the following would reveal websites in the recent DNS cache?

Answer 3

Ipconfig /displaydns

Question 4

What hierarchical database was invented to match fully qualified domain names to IP addresses?

Answer 4

The Domain Name System (DNS) is a global hierarchy system that resolves names to IP addresses.

Question 5

What is the purpose of a DNS server?

Answer 5

Providing an IP address for a fully qualified domain name

Question 6

A multicast streaming service is being implemented to host a new live video conferencing application. Which of the following protocols will be required for this?

Answer 6

IGMP
Internet Group Management Protocol allows for multicast traffic to be created and users to join using Class D addresses.

Question 7

The security team has determined that the lack of accurate timestamps is creating a vulnerability in the network’s ability to audit login attempts. What service can help with this?

Answer 7

NTP
Network Time Protocol establishes a common system time for timestamps to be based off of.

Question 8

What is the name of the technology has changed the landscape of modern networking by moving the control functionality of a networking device to a central managed location?

Answer 8

Software-defined networking (SDN)

Question 9

Which NTP concept is a metric for the distance between the NTP client and the server?

Answer 9

Stratum
The stratum is a value used in NTP to provide an indicator of how many hops a client is away from the NTP server.

Question 10

What type of DNS message is often used to perform a reverse lookup?

Answer 10

PTR
A pointer record in DNS points to a canonical name. This record type is typically used to perform reverse lookups when required.