DNS

What is the name of the DNS daemon in Linux?

named (named.conf)

What is Domain Name System?

An Internet service that translates Fully Qualified Domain Names (FQDN) into IP addresses.

A (blank) resolution resolves from the client resolver to its DNS server

Recursive

What must you do after removing the DHCP role?

Remove the DHCP database manually

If the clients are configured as DHCP clients, they will (blank)

Request that the DHCP server register records.

Clients are called blank

Resolvers - they generate and send queries to server

In a mapping file the Pointer (PTR) is used for (blank to blank) mapping.

Address to name

Given cmps275.instructor.sait.ca. IN SOA inst-1.cmps275.instructor.sait.ca. Admin.cmps275.sait.ca. ( identify the Mail Address

Admin.cmps275.sait.ca.

Another way to say configuration files in Linux

Ascii text files

In Windows, where is the hosts file located in

C:\windows\system32\drivers\etc

A (blank blank) server has the sole job of performing queries, caching the results, and delivering the results. They are not blank.

Caching-only Authoritative

Servers offers three levels of service. They are:

Caching-only Primary Secondary

In Linux DNS Mapping Files: CNAME stands for (blank blank). What is it used for?

Canonical Name Define alias host names

What is the Resolver?

Client software that queries name servers

Define a Zone File

Computer file that contains the mappings for a zone

If there is a selinux problem

edit /etc/selinux/config file and either change it to permissive or disabled

_ clients cannot automatically register A or PTR records directly to the Windows DNS server.

Non-Windows

Zone transfer

Processes of obtaining zone information across the network

A (blank) resolution resolves an IP address to a FQDN

Reverse

The blank is the authoritative name server for each top level domain.

Root

DNS Mapping files are made up of resource records including

SOA (Start of Authority) NS (Name Service) A (Address) -take name give IP HINFO (Hardware Information) TXT (Text) CNAME (Canonical Name) PTR (Pointer) - take IP give name MX (Mail Exchange or Mail Exchanger)

What is the name of the resolver file in Linux? Path to the resolver file?

resolv.conf /etc/resolv.conf

DNS Servers Use the Information in the blank and the blank to Locate

the SRV Record A Resource Record Domain Controllers (DC)

In Linux, where is the hosts file located in

/etc/hosts

Another way to say lease files in Linux

System File

Root cache

type hint;

Linux: Where you give the server it's parameters

/etc/dhcp/dhcpd.conf

Linux: DHCPd is the server daemon in blank (File path)

/usr/sbin/

Linux: dhcpd.leases file path

/var/lib/dhcpd/dhcpd.leases

For workstation to logon to a domain, what is the third and fourth step?

3) Request domain controller's (FQDN) IP Address 4) Receive Domain controller's IP Address (A-record) from DNS

A server has an IP of 192.168.217.5. What is the FULL reverse lookup address?

5.217.168.192.in-addr.arpa

Windows AD Uses SRV Records to Locate

A domain controller in a specific domain or forest A domain controller in the same site as a client computer A domain controller configured as a global catalog server

What is a Primary (primary master, master)?

A name server that gets the data for its zones from local files and is authoritative for the zone

Another way to say Processes in Linux

DHCP daemon

Windows AD uses _ naming standards for domain names

DNS

_ domains and _domains share a common hierarchical naming structure

DNS Active Directory

What is Name Resolution?

DNS translates computer names to IP addresses

Lease information includes:

Directive, declaration, command, parameter

Difference between a Zone and a Domain

Domain Part of the name space, but it may cover more than one zone. A node in the DNS namespace and all subdomains below it. Zone Part of the namespace delegated to a single server Physical file composed of resource records that define a group of domains.

Computers use DNS to locate _ and _ servers

Domain Controllers (DC) Global Catalog (GC) servers

SRV Records Registered by _ on startup using _

Domain Controllers DDNS

A DDNS is a mechanism that allows zone files to be updated (blank). This means that (blank) It is useful in (blank) environments

Dynamically A DNS client can have a DNS server update it's A or PTR records DHCP

Domain Controllers (DC) are identified by three things they are:

FQDN Windows computer name Services they provide

What is the Secondary (secondary master, slave)?

Gets the data for its zones from another name server which is authoritative for that zone

In Linux DNS Mapping Files: HINFO stands for (blank blank). What does it identify?

Hardware Information Identify the hosts OS and hardware type

Fully Qualified DN consist of

Hostname Domain name

Reverse Mapping Zone File contains what kind of mappings?

IP address to Name mappings

What does domain delegation do?

It gives gives an organization authority for a domain. That means that the organization's network administrator is responsible for maintaining the DNS database of hostname and address information for that domain.

A (blank) resolution resolves from one DNS server to other DNS servers.

Iterative

What is the SRV (Service) Resource Records ?

Map a service to the domain controller

In a mapping file the Address (A) is used for (blank to blank) mapping.

Name to Address

Forward-Mapping Zone File contains what kind of mappings?

Name to IP address mappings

How many NS records can you have for each name server for the zone?

One

Which number value in a Mapping file must be incremented every time the file is edited?

Serial

Active Directory Integrated Zones

Stores Primary Zones as an object in the Active Directory database Replicates DNS Zone Information During Active Directory Replication

All cached data has a

TTL

In Linux DNS Mapping Files: TXT stands for (blank) What is it used for?

Text Associate text with host name

In.addr.arpa is used in reverse lookup (we know the address but want to find the name). Describe.

Uses addresses instead of names as labels Nodes in the in-addr.arpa domain are named after the numbers in the dotted-octet representation of IP addresses

What is the cmd command to show cached DNS results?

ipconfig /displaydns

In Windows, what command forces a client to renew DNS registration?

ipconfig /registerdns

Primary name server

type master;

Secondary name server

type slave;

What is the command to install DNS on CentOS?

yum install bind