Deck 9: In-Depth TCP/IP Networking

Question 1

In CIDR, conventional network class distinctions do not exist.

Answer 1

True

Question 2

SMTP operates from port ____.

A) 25
B) 11
C) 110
D) 250

Answer 2

A

Question 3

The MIME standard replaces SMTP.

Answer 3

False

Question 4

Because the octets equal to 0 and 255 are ____, only the numbers 1 through 254 can be used for host information in an IPv4 address.

A) unobtainable
B) out-of-range
C) reserved
D) open for general use

Question 5

The most popular mail server programs are Sendmail and ____.

A) Eudora
B) Microsoft Outlook
C) AOL mail
D) Microsoft Exchange Server

Question 6

The gateways that make up the Internet backbone are called ____ gateways.

A) proxy
B) core
C) Internet
D) default

Question 7

In classful addressing, Class C IPv4 address host information is located in the ____.

A) last 8 bits
B) last 16 bits
C) first 8 bits
D) first 16 bits

Question 8

In ____ addressing, the network information portion of an IPv4 address is limited to the first 8 bits in a Class A address.

A) classful
B) subnet
C) stateful
D) limited

Question 9

An example of a popular client email software is ____.

A) MIME
B) Microsoft Outlook
C) Sendmail
D) Microsoft Exchange Server

Question 10

Within a classful addressing, ____ is the default subnet mask for a Class C address.

A) 255.255.255.255
B) 255.255.255.0
C) 255.255.0.0
D) 255.0.0.0

Question 11

The result from ANDing 11001111 with 10010001 is ____.

A) 11001111
B) 10010001
C) 10000001
D) 00000001

Question 12

The ____ gateway is the gateway that first interprets its outbound requests to other subnets, and then interprets its inbound requests from other subnets.

A) proxy
B) core
C) Internet
D) default

Question 13

IMAP4 servers require less storage space and usually more processing resources than POP servers do.

Question 14

POP3's design makes it best suited to users who retrieve their mail from the same workstation all the time.

Question 15

When using classful IPv4 addressing, a network ID always ends with an octet of ____.

A) 0
B) 00000000
C) 1
D) 255

Question 16

Within a classful addressing subnet mask, the ____ bits indicate that corresponding bits in an IPv4 address contain network information.

A) 0
B) 1
C) first eight
D) last eight

Question 17

On a network using TCP/IP, some nodes may use multiple IP addresses.

Question 18

A class ____ network class is reserved for special purposes.

A) A
B) B
C) C
D) D

Question 19

In classful addressing, the Class B IPv4 address network ID is located in the ____.

A) last 8 bits
B) last 16 bits
C) first 8 bits
D) first 16 bits

Question 20

CIDR notation takes the form of the network ID followed by a(n) ____, followed by the number of bits that are used for the extended network prefix.

A) dash ( - )
B) underscore ( _ )
C) backward slash ( \ )
D) forward slash ( / )

Question 21

Explain how the traceroute utility uses ICMP ECHO requests to trace the path from one networked node to another, identifying all intermediate hops between the two nodes.

Question 22

IMAP (Internet Message Access Protocol) is a mail retrieval protocol that was developed as a more sophisticated alternative to ____.

A) POP3
B) POP
C) SMTP
D) MIME

Question 23

Explain why SNAT is considered static and describe why this is useful.

Question 24

____________________ is a standard for encoding and interpreting binary files, images, video, and non-ASCII character sets within an e-mail message.

Question 25

POP3 (Post Office Protocol, version 3) relies on TCP and operates over port ____.

A) 25
B) 11
C) 110
D) 250

Question 26

Describe four features of IMAP4.

Question 27

Explain how to calculate a host's network ID given its IPv4 address and subnet mask.

Question 28

The ____ utility allows you to view a host's routing table.

A) nbstat
B) pathping
C) dig
D) route

Question 29

The.backbone are called ____________________ gateways.

Question 30

A program similar to mtr, ____, is available as a command-line utility in Windows operating systems.

A) nbstat
B) pathping
C) dig
D) route

Question 31

If subnetting is used on a LAN, explain how devices interpret subnetting information.

Question 32

The combination of additional bits used for subnet information plus the existing network ID is known as the ____________________.

Question 33

____________________ separates a network into multiple logically defined segments, or subnets.

Question 34

Explain how hiding IP addresses on private networks allows network managers more flexibility in assigning addresses.

Question 35

Describe the formula determining how to modify a default subnet mask to create subnets.

Question 36

____________________ is the protocol responsible for moving messages from one mail server to another over TCP/IP-based networks.

Question 37

Describe what PAT is and how it works.

Question 38

The standard message format specified by SMTP allows for lines that contain no more than ____ ASCII characters.

A) 100
B) 1000
C) 10,000
D) 1,000,000

Question 39

An administrator can discover the host name assigned to a client by using the ____ utility.

A) host
B) nbstat
C) hostname
D) nslookup

Question 40

Describe the function of the route utility and provide examples of how it is entered on a UNIX or Linux system, a Windows-based system, and a Cisco-brand router.

Question 41

Explain what happens when an administrator issues the mtr command.