True/False
Indicate whether the
statement is true or false.
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1.
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On a network using TCP/IP, some nodes may use multiple IP addresses.
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2.
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In CIDR, conventional network class distinctions do not exist.
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3.
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The MIME standard replaces SMTP.
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4.
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POP3’s design makes it best suited to users who retrieve their mail from
the same workstation all the time.
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5.
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IMAP4 servers require less storage space and usually more processing resources
than POP servers do.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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A class ____ network class is reserved for special purposes.
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2.
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In ____ addressing, the network information portion of an IPv4 address is
limited to the first 8 bits in a Class A address.
a. | classful | c. | stateful | b. | subnet | d. | limited |
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3.
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In classful addressing, the Class B IPv4 address network ID is located in the
____.
a. | last 8 bits | c. | first 8 bits | b. | last 16 bits | d. | first 16 bits |
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4.
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In classful addressing, Class C IPv4 address host information is located in the
____.
a. | last 8 bits | c. | first 8 bits | b. | last 16 bits | d. | first 16 bits |
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5.
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Within a classful addressing subnet mask, the ____ bits indicate that
corresponding bits in an IPv4 address contain network information.
a. | 0 | c. | first eight | b. | 1 | d. | last eight |
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6.
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Within a classful addressing, ____ is the default subnet mask for a Class C
address.
a. | 255.255.255.255 | c. | 255.255.0.0 | b. | 255.255.255.0 | d. | 255.0.0.0 |
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7.
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The result from ANDing 11001111 with 10010001 is ____.
a. | 11001111 | c. | 10000001 | b. | 10010001 | d. | 00000001 |
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8.
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When using classful IPv4 addressing, a network ID always ends with an octet of
____.
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9.
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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 | c. | reserved | b. | out-of-range | d. | open for general
use |
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10.
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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 ( - ) | c. | backward slash ( \ ) | b. | underscore ( _ ) | d. | forward slash ( /
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11.
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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 | c. | Internet | b. | core | d. | default |
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12.
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The gateways that make up the Internet backbone are called ____ gateways.
a. | proxy | c. | Internet | b. | core | d. | default |
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13.
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The most popular mail server programs are Sendmail and ____.
a. | Eudora | c. | AOL mail | b. | Microsoft Outlook | d. | Microsoft Exchange
Server |
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14.
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An example of a popular client email software is ____.
a. | MIME | c. | Sendmail | b. | Microsoft Outlook | d. | Microsoft Exchange
Server |
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15.
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SMTP operates from port ____.
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16.
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The standard message format specified by SMTP allows for lines that contain no
more than ____ ASCII characters.
a. | 100 | c. | 10,000 | b. | 1000 | d. | 1,000,000 |
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17.
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POP3 (Post Office Protocol, version 3) relies on TCP and operates over port
____.
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18.
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IMAP (Internet Message Access Protocol) is a mail retrieval protocol that was
developed as a more sophisticated alternative to ____.
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19.
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An administrator can discover the host name assigned to a client by using the
____ utility.
a. | host | c. | hostname | b. | nbstat | d. | nslookup |
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20.
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A program similar to mtr, ____, is available as a command-line utility in
Windows operating systems.
a. | nbstat | c. | dig | b. | pathping | d. | route |
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21.
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The ____ utility allows you to view a host’s routing table.
a. | nbstat | c. | dig | b. | pathping | d. | route |
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Completion
Complete each
statement.
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1.
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____________________ separates a network into multiple logically defined
segments, or subnets.
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2.
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The combination of additional bits used for subnet information plus the existing
network ID is known as the ____________________.
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3.
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The.backbone are called ____________________ gateways.
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4.
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____________________ is the protocol responsible for moving messages from one
mail server to another over TCP/IP-based networks.
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5.
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____________________ is a standard for encoding and interpreting binary files,
images, video, and non-ASCII character sets within an e-mail message.
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Matching
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Match each item with a statement below: a. | ipconfig utility | f. | dig
utility | b. | ifconfig utility | g. | nslookup utility | c. | netstat utility | h. | route utility | d. | nbstat
utility | i. | traceroute
utility | e. | host utility |
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1.
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Displays TCP/IP statistics and details about TCP/IP components and connections
on a host.
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2.
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Allows an administrator to query the DNS database from any computer on the
network and find the host name of a device by specifying its IP address, or vice versa.
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3.
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Useful only on networks that run Windows-based operating systems and
NetBIOS.
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4.
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Allows an administrator to query a DNS database and find the host name
associated with a specific IP address or vice versa.
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5.
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The TCP/IP administration utility for use with Windows operating
systems.
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6.
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Allows you to view a host’s routing table.
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7.
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Used if an administrator already know a host’s name and wants to learn
its IP address.
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8.
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The TCP/IP configuration and management utility used on UNIX and Linux
systems.
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9.
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Uses ICMP ECHO requests to trace the path from one networked node to another,
identifying all intermediate hops between the two nodes.
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Short Answer
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1.
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Explain how to calculate a host’s network ID given its IPv4 address and
subnet mask.
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2.
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Describe the formula determining how to modify a default subnet mask to create
subnets.
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3.
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If subnetting is used on a LAN, explain how devices interpret subnetting
information.
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4.
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Explain how hiding IP addresses on private networks allows network managers more
flexibility in assigning addresses.
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5.
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Explain why SNAT is considered static and describe why this is useful.
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6.
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Describe what PAT is and how it works.
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7.
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Describe four features of IMAP4.
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8.
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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.
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9.
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Explain what happens when an administrator issues the mtr command.
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10.
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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.
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