$1.$ Which of the following are NOT Application layer protocols $($More than one protocol applies$)?$

a$.$

ICMP $($Internet Control Message Protocol$)$

b$.$

TCP $($Transmission Control Protocol$)$

c$.$

DHCP $($Dynamic Host Configuration Protocol$)$

d$.$

UDP $($User Datagram Protocol$)$

e$.$

ARP $($Address Resolution Protocol$)$

f$.$

IP $($Internet Protocol$)$ v$6$

$2.$ Which one of the following is a function of the Application layer?

a$.$

Provides frame error detection in the form of a CRC $($Cyclic Redundancy Check$)$ code.

b$.$

Routes packets through an internetwork.

c$.$

Protects data with a checksum.

d$.$

Data formatting and translation.

$3.$ Which one of the following statements regarding e$-$mail protocols is NOT TRUE?

a$.$

E$-$mail clients use POP$3($Post Office Protocol version $3)$ to download incoming messages from an e$-$mail server to their local desktops.

b$.$

POP$3$ uses TCP $($Transmission Control Protocol$)$ port $121.$

c$.$

IMAP$4($Internet Message Access Protocol version $4)$ has the capability to manage messages locally yet store them on a server.

d$.$

IMAP$4$ uses TCP port $143.$

e$.$

POP$3$ is used to retrieve e$-$mail and SMTP $($Simple Mail Transfer Protocol$)$ is used to send it$.$

f$.$

SMTP uses TCP port $25.$

$4.$ Which protocol uses TCP $($Transmission Control Protocol$)$ port $21$ for sending control commands?

a$.$

FTP $($File Transfer Protocol$)$

b$.$

ARP $($Address Resolution Protocol$)$

c$.$

IMAP $($Internet Message Access Protocol$)$

d$.$

ICMP $($Internet Control Message Protocol$)$

$5.\_\_\_\_\_\_\_\_$is an Application$-$layer protocol used to monitor and manage network devices, and operates on $\_\_\_\_\_\_\_\_$ ports, $\_\_\_\_\_\_\_\_$and $\_\_\_\_\_\_\_\_.$

a$.$

DHCP $($Dynamic Host Configuration Protocol$),$ TCP $($Transmission Control Protocol$),67$ and $68$

b$.$

SNMP $($Simple Network Management Protocol$),$ UDP $($User Datagram Protocol$),161$ and $162$

c$.$

SMTP $($Simple Mail Transfer Protocol$),$ TCP$,25$ and $26$

d$.$

FTP $($File Transfer Protocol$),$ UDP, $20$ and $21$

$6.$ The first packet in the four$-$packet exchange between a DHCP $($Dynamic Host Configuration Protocol$)$ client and server is the DHCPRequest. Is this statement TRUE or FALSE?

a$.$

True

b$.$

False

$7.$ Which part of the address www$.$marketing.localdomain.org is the top$-$level domain name?

a$.$

org

b$.$

www

c$.$

localdomain

d$.$

marketing

$8.$ What does the SRV $($Service$)$ record do in a DNS $($Domain Name System$)$ zone?

a$.$

Allows DNS clients to request the address of a server that provides a specific service instead of querying the server by name.

b$.$

It identifies the authoritative name server for a domain.

c$.$

It identifies the e$-$mail server to be used for e$-$mail traffic for the domain.

d$.$

It holds the alternative names for a host.

$9.$ Where does a DNS $($Domain Name System$)$ server look when it cannot resolve a query from its zone records or cache?

a$.$

Root hints

b$.$

Alternate server

c$.$

Top$-$level domain

d$.$

BIND

$10.$ Which statements regarding IPv$4($Internet Protocol version $4)$ or IP are INCORRECT $($More than one statement applies$)?$

a$.$

IP is a Network access$-$layer protocol.

b$.$

IP is a connection$-$oriented protocol, so it is efficient and reliable.

c$.$

IPv$4$ defines a $64-$bit dotted decimal address.

d$.$

The protocol field in an IP header is a numeric code specifying the type of IP packet or the next$-$layer protocol contained in the packet.

$11.$ Which statements regarding TCP $($Transmission Control Protocol$)$ and UDP $($User Datagram Protocol$)$ are CORRECT $($More than one statement applies$)?$

a$.$

TCP and UDP are both Transport layer protocols.

b$.$

TCP is connection$-$oriented and unreliable.

c$.$

UDP is connection$-$oriented and reliable.

d$.$

TCP and UDP protect data with a checksum.

$12.$ Which one of the following is used by TCP $($Transmission Control Protocol$)$ and UDP $($User Datagram Protocol$)$ to specify the source and destination Application$-$layer protocols?

a$.$

Segment numbers

b$.$

Window size headers

c$.$

Port numbers

d$.$

IP addresses

$13.$ Which of the following features are NOT found in UDP $($User Datagram Protocol$)($More than one feature applies$)?$

a$.$

Establishing a connection

b$.$

Port numbers

c$.$

Checksum

d$.$

Ensuring flow control with acknowledgements

$14.$ From the list below, HOW MANY are improvements and changes of IPv$6$ over IPv$4?$

$-$ Larger address space

$-$ Autoconfiguration

$-$ The ability to resolve logical $($IP$)$ address to a physical address.

$-$ The ability to send error, status and control message between systems or devices.

$-$ Extensibility

a$.$

$2$

b$.$

$3$

c$.$

$4$

d$.$

$5$

$15.$ Which of the following are tasks performed by the Network Access layer $($More than one task applies$)?$

a$.$

Verifies that incoming frames have the correct destination MAC $($Media Access Control$)$ address.

b$.$

Defines and verifies IP $($Internet Protocol$)$ addresses.

c$.$

Transmits and receives bit signals.

d$.$

Resolves MAC addresses by using IP addresses.

e$.$

Delivers packets efficiently.

$16.$ Which subnet mask should you use if you want $16$ bits of host address space?

a$.$

$255\mathrm{.}255\mathrm{.}0\mathrm{.}0$

b$.$

$255\mathrm{.}16\mathrm{.}0\mathrm{.}0$

c$.$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}16$

d$.$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}0$

$17.$ What is the network ID of the IP $($Internet Protocol$)$ address $172\mathrm{.}19\mathrm{.}48\mathrm{.}16$ with subnet mask $255\mathrm{.}255\mathrm{.}240\mathrm{.}0?$

a$.$

$172\mathrm{.}19\mathrm{.}0\mathrm{.}0$

b$.$

$172\mathrm{.}19\mathrm{.}32\mathrm{.}0$

c$.$

$172\mathrm{.}19\mathrm{.}48\mathrm{.}0$

d$.$

$172\mathrm{.}19\mathrm{.}240\mathrm{.}0$

$18.$ Which one of the following is an invalid IP address$/$prefix to assign to a host?

a$.$

$172\mathrm{.}31\mathrm{.}0\mathrm{.}255/16$

b$.$

$172\mathrm{.}16\mathrm{.}255\mathrm{.}128/25$

c$.$

$201\mathrm{.}18\mathrm{.}149\mathrm{.}32/26$

d$.$

$10\mathrm{.}255\mathrm{.}0\mathrm{.}0/8$

$19.$ The decimal equivalent of the binary number $10000001$ is $133.$ Is this statement TRUE or FALSE?

a$.$

True

b$.$

False

$20.$ Which IPv$4$ address is a Class C address?

a$.$

$225\mathrm{.}100\mathrm{.}149\mathrm{.}20$

b$.$

$125\mathrm{.}88\mathrm{.}1\mathrm{.}66$

c$.$

$193\mathrm{.}19\mathrm{.}101\mathrm{.}11$

d$.$

$177\mathrm{.}14\mathrm{.}23\mathrm{.}19$

$21.$ TCP $($Transmission Control Protocol$)/$IP $($Internet Protocol$)$s technical governing body reserved a series of addresses for private networks this is networks whose hosts cannot be accessed directly through the Internet. Which one of the following is NOT a reserved address?

a$.$

For Class A$,$ all addresses beginning with $10$

b$.$

For Class B$,$ addresses from $172\mathrm{.}16$ to $172\mathrm{.}31$

c$.$

For Class C$,$ addresses from $201\mathrm{.}168\mathrm{.}0$ to $201\mathrm{.}168\mathrm{.}255$

$22.$ Which IP $($Internet Protocol$)$ address expressed in CIDR $($Classless Inter$-$Domain Routing$)$ notation has the subnet mask $255\mathrm{.}255\mathrm{.}255\mathrm{.}0?$

a$.$

$10\mathrm{.}100\mathrm{.}44\mathrm{.}123/24$

b$.$

$172\mathrm{.}16\mathrm{.}88\mathrm{.}222/16$

c$.$

$192\mathrm{.}168\mathrm{.}100\mathrm{.}1/26$

d$.$

$172\mathrm{.}29\mathrm{.}111\mathrm{.}201/18$

$23.$ If your original network address with prefix is