6.5

Question 1

Services listen on what ports?

Answer 1

Well-known ports (0-1023)

Question 2

Objects that allow software to communciate and send data across a network connection via access to a computer’s Network Interface Card; Require an active port and IP address.

Answer 2

Socket

Question 3

Tool used to view socket information in RAM.

Answer 3

netstat

Question 4

Provides a network service for passing configuration information including IP address, subnet mask, DNS server, and default gateway to hosts on a TCP/IP.

Answer 4

Dynamic Host Configuraiton Protocol (DHCP)

Question 5

What are the four steps of the DHCP process?

Answer 5

1. Discover
2. Offer
3. Request
4. Acknowledge

Question 6

The basis for a more advanced network manager protocol, the Dynamic Host Configuration Protocol (DHCP).

Answer 6

BOOTP (Bootstrap Protocol)

Question 7

A distributed naming system used on /TCP/IP networks to map computer names to IP addresses and IP addresses to computer.

Answer 7

Domain Name System (DNS)

Question 8

Domain Name System machines that provide access to the root zone file, containing information on all top-level domains.

Answer 8

Root Name Server

Question 9

Files that contain information on all Top-Level Domains (TLDs).

Answer 9

Root Zone File

Question 10

What are three types of TLDs within the DNS discussed in class?

Answer 10

• Generic TLD (gTLD)
• Sponsored TLD (sTLD)
• Country Code TLD (ccTLD)

Question 11

TLDs with three or more characters such as .com, .net, and .org.

Answer 11

General TLD (gTLD)

Question 12

A subset of the gTLDs, these sites are paid for by an organization such as the DoD paying for the .mil domain.

Answer 12

Sponsored TLD (sTLD)

Question 13

TLD that contains domains representing over 240 countries and external territories.

Answer 13

Country Code TLD (ccTLD)

Question 14

A unique name used to identify a particular system on the Internet. Listed in dotted notation, <hostname>.<domain name> (i.e., mail.yahoo.com)

Answer 14

Fully Qualified Domain Name (FQDN)

Question 15

The name server that is the best source of information for the domain.

Answer 15

Start of Authority (SOA)

Question 16

The authoritative name servers for a particular zone who will answer queries for their supported zone.

Answer 16

Name Servers (NSs)

Question 17

A Domain Name System record containing information about servers, hosts, and services.

Answer 17

Resource Record

Question 18

What are the different types of DNS records?

Answer 18

• SOA (Start of Authority)
• NS (Name Server)
• A (Host Records)
• AAAA (IPv6 Host Records)
• CNAME (Canonical Name)
• MX (Mail eXchange)
• SRV (Service Record)
• PTR (Pointer Record)

Question 19

Used to request an IP address for a known FQDN or to request an FQDN for a known IP address.

Answer 19

DNS queries

Question 20

What are two types of DNS queries?

Answer 20

Recursive and iterative

Question 21

Used to forward DNS queries to DNS servers outside of the network.

Answer 21

DNS forwarder observers

Question 22

What allows a server to respond to multiple queries more quickly for a previously resolved domain or host.

Answer 22

DBS Caching

Question 23

What is conducted when a primary DNS server transfers its cache database to a secondary or back-up?

Answer 23

Zone transfer

Question 24

What protocol is used to send mail messages across a network and is the basis for Internet email?

Answer 24

Simple Mail Transport Protocol (SMTP); Port 25

Question 25

What protocol is used to retrieve email from a mail server?

Answer 25

**Post Office Protocol 3 (POP3); *Port 110***

Question 26

Which protocol is similar to POP3 and enables a user to search through messages based on keywords and select which messages the user wishes to download to their local device?

Answer 26

**Internet Message Access Protocol 4 (IMAP4); *Port 143***

Question 27

What protocol is a set of rules for exchanging files (text, graphic images, sound, video, and other multimedia files) from server to client and vice versa?

Answer 27

**Hypertext Transfer Protocol (HTTP); *Port 80***

Question 28

What protocol is an extension to the HTTP protocol where the HTTP protocol rides over the Secure Sockets Layer (SSL) or Transport Layer Security (TLS) protocols, providing security to a web session?

Answer 28

**Hypertext Transfer Protocol Secure (HTTPS); *Port 443***

Question 29

What protocol is an Application layer protocol of the TCP/IP suite capable of securing other application layer protocols?

Answer 29

**Secure Sockets Layer (SSL); *Port 22***

Question 30

What protocol is an upgrade to, and is more robust than, SSL?

Answer 30

**Transfer Layer Security (TLS)**