Network Services Quiz Flashcards
A range of IP addresses that a DHCP server can lease out to DHCP clients is known as:
Scope
A DHCP server’s IP exclusion configuration option allows network administrators to remove a single IP address or a range of IP addresses from the pool of addresses being assigned automatically to the requesting DHCP client computer. IP exclusion prevents other DHCP clients from requesting an IP address statically assigned to other essential network hosts(e.g. server, or a wireless printers) via DHCP reservation.
True
Which of the terms listed below refers to permanent IP address assignment from a DHCP server?
Reservation
One of the features of the DHCP is capability for static allocation of an IP address based on the IP-to-MAC address mapping
True
The duration of time a DHCP client can use an IP address dynamically assigned by the DHCP server is referred to as:
Lease
Networked clients not residing on the same subnet as the DHCP server can still obtain an IP address from the server through a DHCP relay agent (a.k.a. IP helper).
True
To connect to a website and display its contents, a URL entered in the web browser address bar needs to be translated into an IP address. Which of the servers listed below is used to handle this type of request.
DNS server
Which of the DNS database records listed below returns a 32-bit address?
A (address)
The DNS database AAAA record creates a pointer that maps a hostname to:
IPv6 address
Which of the following DNS database records allows multiple domain names to resolve to the same IP address?
CNAME (Canonical Name)
Which of the following DNS database records maps a domain name to a list of mail servers for that domain?
MX (Mail Exchange)
A DNS record that stores administrative information about a domain or zone is known as:
SOA (Start of Authority)
Which of the following statements describing the function of a DNS PTR record are true? (Select 2 answers)
PTR record resolves an IP address to a hostname for a reverse lookups
The functionality provide by a PTR record is the opposite of A and AAAA DNS records
What is the function of a DNS TXT record? (Select 2 answers)
Provides outside services with additional information about a domain
Not used to direct any traffic
Which DNS record specifies a host and port information that allow to find specific services on a network?
DKIM (Domain Keys Identified Mail)
DNS record that specifies a list of additional name server on a domain is called?
NS (Name Server)
The answers below have been arranged to represent the DNS hierarchy from the highest level of the DNS tree (1) to the lowest level (5).
- Root Level
- Top Level Domains
- Second Level Domains
- Sub-Domain
- Host
The term “DNS zone transfer” is used to describe the process of copying the contents of a DNS database stored on a primary DNS server to the secondary DNS servers.
True
In DNS, an authoritative name server is a server that stores DNS record information, (it is the actual server that answers DNS queries). A recursive DNS server does not hold any DNS records; it tracks down the IP address for a given hostname by communicating with other DNS servers (acts as an intermediary between a web client sending the DNS query and the authoritative name server).
True
Which of the following defines how long DNS settings are stored in cache before they are updated?
TTL
A revers DNS lookup zone is used for finding an IP address associated with a given domain name.
False
A forward DNS lookup zone returns a domain name for a given IP address.
False
In DNS, a type of query that returns either a valid address or a message indicating that the address cannot be found is known as iterative query.
False
A type of DNS query that returns either a valid address or a referral to another DNS server that may hold relevant information to the name resolution process is known as recursive query.
False
