Quiz 6 Flashcards
Which of the following describes the relationship of a DNS ‘A’ record versus a ‘Pointer’ record?
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.
What is a DNS MX record?
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.
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?
Ipconfig /displaydns
What hierarchical database was invented to match fully qualified domain names to IP addresses?
The Domain Name System (DNS) is a global hierarchy system that resolves names to IP addresses.
What is the purpose of a DNS server?
Providing an IP address for a fully qualified domain name
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?
IGMP
Internet Group Management Protocol allows for multicast traffic to be created and users to join using Class D addresses.
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?
NTP
Network Time Protocol establishes a common system time for timestamps to be based off of.
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?
Software-defined networking (SDN)
Which NTP concept is a metric for the distance between the NTP client and the server?
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.
What type of DNS message is often used to perform a reverse lookup?
PTR
A pointer record in DNS points to a canonical name. This record type is typically used to perform reverse lookups when required.