Deck 11: Domain Name System

Question 1

The goal of DNS is to centralize administration.

Answer 1

False

Question 2

In openSUSE, BIND requires configuration after you install it.

Answer 2

False

Question 3

The main BIND DNS configuration file, named.conf, is in the /etc directory.

Answer 3

True

Question 4

The A (address) RR is the most common resource record.

Question 5

By default, openSUSE specifies /var/lib/named as the name server's working directory.

Question 6

____ is open-source software containing the DNS protocols needed to resolve hostnames to IP addresses.

A) DHCP
B) SOA
C) BIND
D) PHP

Question 7

DNS is a distributed and ____ database that allows controlling DNS management locally.

A) authoritative
B) submissive
C) linear
D) hierarchical

Question 8

The default time-to-live (TTL) value is typically one ____.

A) minute
B) hour
C) day
D) week

Question 9

Centrally controlled ____ DNS servers are known as root DNS servers.

A) public
B) private
C) local
D) remote

Question 10

What top-level domain would the FBI typically use?

A) .com
B) .net
C) .org
D) .gov

Question 11

What top-level domain has no real governing body controlling how it is used?

A) .com
B) .net
C) .org
D) .gov

Question 12

What top-level domain would the Democratic Party typically use?

A) .com
B) .net
C) .org
D) .gov

Question 13

What top-level domain is used for the United States?

A) .us
B) .usa
C) .com
D) .gov

Question 14

Each level of the DNS hierarchy is separated by ____ in the domain name.

A) forward slashes
B) hyphens
C) dots
D) semicolons

Question 15

The BIND documentation consist of ____ chapters.

A) two
B) three
C) six
D) eight

Question 16

To start the named daemon (BIND), you use the ____ command.

A) yast start
B) rcnamed start
C) bind start
D) rccheck start

Question 17

Which Bind utility command checks the status of the named daemon?

A) rcnamed status
B) rccheck status
C) rcstatus
D) rccheck daemon

Question 18

You can have up to ____ forwarders in your DNS configuration.

A) two
B) three
C) five
D) eight

Question 19

The first time you configure a DNS server, the forwarder list ____.

A) points to the slave name server
B) contains the loopback address
C) does no exist
D) is empty

Question 20

Within the forwarder declaration /etc/named.conf file, what symbol represents a commented line?

A) dollar sign ($)
B) pound sign ()
C) question mark (?)
D) semi colon (;)

Question 21

The zone file ____ entry specifies how often slave name servers check the serial number to see whether the zone file has changed.

A) time-to-live (TTL)
B) refresh rate
C) expiration entry
D) negative TTL

Question 22

Which resource record defines the name server in charge of the domain?

A) A RR
B) MX RR
C) NS RR
D) PTR RR

Question 23

Which DNS module window displays the options that have already been defined for the zone?

A) General
B) Start-Up
C) Forwarders
D) Basic Options

Question 24

By default, the DNS server sends log data to the systemwide log file ____.

A) /var/log/messages
B) /etc/var/log/messages
C) /etc/log/messages
D) /var/messages

Question 25

When creating an ACL, you must give it a unique name and specify a(n) ____ under the Value heading.

A) URL
B) IP address
C) TTL
D) router

Question 26

When creating an ACL, the IP address must be enclosed by braces and end with a ____.

A) colon (:)
B) dash (-)
C) period (.)
D) semicolon (;)

Question 27

A(n) ____________________ is a central database that translates names to IP addresses (or IP addresses to names).

Question 28

The local DNS server forwards requests for unknown hostnames to a(n) ____________________, which is a type of DNS server.

Question 29

____________________ is a feature that stores DNS queries on the local site for fast hostname-to-IP address resolution.

Question 30

The nodes (leaves) of the DNS database tree structure are called ____________________ and have labels.

Question 31

The DNS namespace is divided into units called ____________________ that describe portions of a domain.

Question 32

Match each statement with an item

-An authoritative name server that stores the primary copies of zone records.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 33

Match each statement with an item

-Enables you to create an alias for a host.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 34

Match each statement with an item

-A resource record containing basic information about a zone.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 35

Match each statement with an item

-Servers that enable you to forward unresolved queries to an offsite DNS server and then cache the results on your local DNS server.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 36

Match each statement with an item

-Identifies mail servers (mail exchangers) for a zone.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 37

Match each statement with an item

-Maintains a copy of the master zone file that's used as a backup.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 38

Match each statement with an item

-Used to resolve a hostname to an IPv4 address for locating a resource.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 39

Match each statement with an item

-Control the Internet's top-level domains (TLDs).

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 40

Match each statement with an item

-Used to resolve an IPv4 address to its hostname.

A) Root DNS servers
B) Master name server
C) Slave name server
D) Forwarder
E) MX RR
F) A RR
G) PTR RR
H) CNAME RR
I) Start of Authority (SOA)

Question 41

Why were name servers created?

Question 42

Why was the Internet's Domain Name System (DNS) created?

Question 43

Describe the Internet's Domain Name System (DNS).

Question 44

Define the job of the forwarder and provide an example.

Question 45

How do you install BIND?

Question 46

How can you edit the named.conf file?

Question 47

Describe a slave name server and explain its purpose.

Question 48

Discuss how a zone files negative TTL entry is used.

Question 49

Describe a zone file serial number entry.

Question 50

Describe transaction signatures and explain how you can generate keys for these signatures.