CompTIA Network+ Certification Exam N10-008 Practice Test 10

Which of the following statements describing the function of a DNS PTR record are true? (Select 2 answers) -PTR record creates a pointer that maps a hostname to an IP address for reverse lookups. -The functionality provided by a PTR record allows multiple domain names to resolve to the same IP address. -PTR record resolves an IP address to a hostname for reverse lookups. -The functionality provided by a PTR record is the opposite of A and AAAA DNS records. -PTR record maps a domain name to a list of mail servers for that domain.

-PTR record resolves an IP address to a hostname for reverse lookups. -The functionality provided 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) -Resolves an IP address to a hostname for reverse lookups -Maps a domain name to a list of mail servers for that domain -Provides outside services with additional information about a domain -Not used to direct any traffic -Allows multiple domain names to resolve to the same IP address

-Provides outside services with additional information about a domain -Not used to direct any traffic

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). Which of these answers are out of order? (Select all that apply) 1. Root domain (".", e.g. the optional trailing dot in "example.com.") 2. Top level domain (e.g. ".com", ".org", or ".edu") 3. Subdomain (e.g. "department" in "department.example.com") 4. Second level domain (e.g. "example.com") 5. Host or resource name (e.g. "a" in "a.department.example.com")

3. Subdomain (e.g. "department" in "department.example.com") 4. Second level domain (e.g. "example.com")

Which of the following answers refer to the layers that can be found in the three-tiered datacenter network architecture model? (Select 3 answers) Core layer Distribution/aggregation layer Application layer Infrastructure layer Access/edge layer

Core layer Distribution/aggregation layer Access/edge layer

Which of the following answers refers to network traffic within a data center, a.k.a. server-to-server traffic? North-south Real-time Non-real-time East-west

East-west

A forward DNS lookup zone returns a domain name for a given IP address. True False

False

A reverse DNS lookup zone is used for finding an IP address associated with a given domain name. True False

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. True False

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. True False

False

Which of the following DNS database records maps a domain name to a list of mail servers for that domain? NS SPF MX PTR

MX

DNS record that specifies a list of additional name servers on a domain is called: SPF NS PTR SRV

NS

Which of the following answers refers to network traffic flowing into and out of a data center? Real-time North-south East-west Non-real-time

North-south

A type of cloud infrastructure available solely for a single organization is known as: Public cloud Community cloud Hybrid cloud Private cloud

Private cloud

Which of the following answers refers to a cloud computing delivery model in which the cloud infrastructure is provisioned for open use by the general public? Hybrid cloud Private cloud Community cloud Public cloud

Public cloud

A dedicated local network consisting of devices providing data access is called: SDN NAS iSCSI SAN

SAN

FCoE, Fibre Channel, and iSCSI are connection types used in: SAN VLAN NAS SDN

SAN

Which of the answers listed below refers to a technology designed to simplify network infrastructure management? SAN SDN SSP SEH

SDN

A DNS record that stores administrative information about a domain or zone is known as: NS SOA CNAME SRV

SOA

Which DNS record specifies a host and port information that allow to find specific services on a network? SRV NS PTR DKIM

SRV

Which of the following defines how long DNS settings are stored in cache before they are updated? TTL REFRESH NULL EXPIRE

TTL

A cloud delivery model consisting of two or more interlinked cloud infrastructures (private, community, or public) is referred to as a hybrid cloud. True False

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 False

True

In NTP, stratum 0 denotes highest accuracy of the time source (i.e. the reference clock). True False

True

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 False

True

Which of the following answers refer to the characteristics of the spine-and-leaf datacenter network architecture model? (Select 2 answers) Star topology Two-tier architecture Full mesh topology Three-tier architecture Single-tier architecture

Two-tier architecture Full mesh topology