Review TCP/IP and OSI Reference Model 1.What is the port number for TCP? A.6 B. 11 C.17 D. 45 2.What is the port number for UDP?

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Oct 27, 2013 (4 years and 16 days ago)

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Review
TCP/IP and OSI Reference Model


1.

What is the port number for TCP?


A.

6






B. 11

C.

17






D. 45


2.

What is the port number for UDP?


A.

6






B. 11

C. 17






D. 45

3.

User Datagram Protocol works at which layer of the DOD model?


A.

Transport





B. Internet

C. Ho
st
-
to
-
Host




D. Data Link


4.

Which protocol works at the Internet layer and is responsible for making routing decisions ?


A.

TCP





B. UDP

C. IP






D. ARP



5.

Which protocol will send a message to routers if a network outage or congestion occurs?


A. IP






B. ARP

C. ICMP





D. TCP


6.

Which port numbers are used by TCP and UDP to set up sessions with other hosts?


A. 1
-
255





B. 256
-
1022

C. 1023 and above




D. 6 and 10 respectively


7.

Which of the following is true.


A.

TCP is connection
-
oriented; UDP uses

acknowledgements only

B.

Both TCP and UDP are connection
-
oriented, but only TCP uses windowing

C.

TCP is connection
-
oriented, but UDP is connectionless

D.

TCP and UDP both have sequencing, but UDP is connectionless


8.

Which protocol is used to manage and monitor the

network?


A.

FTP





B. SMTP

C. SNMP





D. IP


9.

Which frame type uses DSAPs and SSAPs to identify the upper
-
layer.


A.

802.3





B. 802.5

C. 802.2





D. Ethernet II


10.

Which frame has a Type field to identify the upper
-
layer protocol?


A.

802.3





B. 802.5

C. 8
02.2





D. Ethernet II

11.

What does the acronym ARP stand for?


A.

ARP Resolution Protocol



B. Address Restitution Protocol

C. Address Resolution Phase



D. Address Resolution Protocol


12.

Ping uses which Internet layer protocol (besides IP) ?


A.

ARP





B. RARP

C
. DCMP





D. ICMP


13.

Which protocol sends redirects back to an originating router?


A.

ARP





B. RARP

C. ICMP





D. BootP

E. IP






F. TCP

G. UDP


14.

Which of the following protocols are used to get an IP address from known MAC address?


A.

ARP





B. RARP

C
. ICMP





D. BootP

E. IP






F. TCP

G. UDP


15.

Which of the following protocols is used to give an IP address to a diskless machine?


A.

ARP





B. RARP

C. ICMP





D. BootP

E. IP






F. TCP

G. UDP


16.

Which two of the following protocols are used at the
Transport layer?


A.

ARP





B. RARP

C. ICMP





D. BootP

E. IP






F. TCP

G. UDP


17.

Which protocol gets a hardware address from a known IP address?


A.

ARP





B. RARP

C. ICMP





D. BootP

E. IP






F. TCP

G. UDP


18.

Which of the following is a connectionl
ess protocol at the Transport layer?


A. ARP





B. RARP

C. ICMP





D. BootP

E. IP






F. TCP

G.

UDP


19.

If a router in your internetwork experienced congestion on serial port 0, which protocol will let the
neighbor routers know?


A. ARP





B. RARP

C. I
CMP





D. BootP

E. IP






F. TCP

G. UDP


20.

Which protocol is used for booting diskless workstations?


A. ARP





B. RARP

C. ICMP





D. BootP

E. IP






F. TCP

G. UDP


21.

Match these application layer services to their corresponding transport layer pr
otocol port.




A. SMTP





1. TCP/23



B. FTP





2. TCP/25



C. TFTP





3. TCP/80



D. Telnet





4. TCP/21



E. HTTP





5. UDP/69



F. DNS





6. TCP/53


22. Which OSI reference model layer does Telnet fu
nction at?




A. Transport





B. Network



C. Session





D. Application


23.


How many layers does the TCP/IP protocol suite have, compared to the OSI reference model?





A. TCP model has 4, OSI model has 6

B. TCP model has 7, OSI mod
el has 8



C. TCP model has 4, OSI model has 7

D. TCP model has 7, OSI model has 4


24.

The TCP/IP protocol suite has a formal session layer that includes NetBIOS, RPCs, and TLI


functions




A. True





B. False


25.

What is the function
of RPCs?




A. To move files from remote PCs to a local PC



B. To make remote function calls transparent, so they appear to be local



C. To initialize a program on a remote PC

B.

To send a procedure that is local to a remote node for p
rocessing elsewhere


26.

What does RPC stand for?




A. Remote personal computer


B. Reserved
-
programming call



C. Routed
-
procedure call



D. Remote
-
procedure call







27.

What OSI reference model layer do sockets function at?




A. Appli
cation




B. Presentation



C. Session





D. Transport



E. Network





F. Data link


G. Physical


28.

What function do sockets perform?




A. They make remote functions appear local, transparent to the user



B. They transfer

files to and from remote nodes

C.

They make the transport layer independent

D.

They allow multiple applications to share the same connection to the network


29.

What is WinSock?



A. A version of sockets for the Microsoft Windows platform



B. Socket
s on BSD UNIX



C. A session layer API commonly considered to be its own protocol

D.

A network layer service for Microsoft Windows


30.

What does TLI do?




A. It makes remote functions appear local, transparent to the user

B.

It transfers files to

and from remote nodes

C.

It makes the transport layer independent

D.

It allows multiple applications to share the same connection to the network



31.

What OSI layer does NetBIOS function at?




A. Application




B. Presentation



C. Session





D. Tran
sport



E. Network





F. Data link


G. Physical


32.

Which protocols can NetBIOS bind to? (Select all that are applicable.)




A. Appletalk





B. IPX



C. IP






D. NetBEUI


33.

What layers do not exist in the TCP/IP model that are i
n the OSI model?




A. Application, presentation, and network



B. Presentation, session, and data link



C. Session, network, and physical



D. Presentation, data link, and physical






34.

What is a socket in the transport la
yer?




A. The socket is an IP address plus a port



B. An API that makes the transport layer independent



C. An API that allows multiple applications to share a network connection



D. A function that makes remote procedures a
ppear to be local


35.

What is a port?




A. An API that makes the transport layer independent



B. An API that allows multiple applications to share a network connection



C. A function that makes remote procedures appear to be local




D. The point where upper
-
layer processes access transport layer services


36.

Which of the following services uses a process called windowing?




A. Reliable data transfer



B. Connection
-
oriented virtual circuit



C. Buffered transfer




D
. Resequencing


E. Multiplexing




F. Efficient, full
-
duplex transmission



G. Flow control


37. What is UDP?




A. An API that makes the transport layer independent



B. A connectionless, unreliable transport protocol



C. An API that

allows multiple applications to share a network connection



D. A function that makes remote procedures appear to be local


38. What is IP?




A. It is the transport mechanism for upper layer services



B. It is the session layer API f
or making the transport layer independent



C. It is the network layer protocol that moves data from one node to another



D. It is the physical layer protocol for Internet connections


39. What is ICMP?




A. It is a network layer prot
ocol that handles control messages



B. It is a network layer protocol that resolves addresses



C. It is a session layer API that makes remote procedures transparent to a user



D. It is a transport layer function for unreliable trans
port


40. Ping sends an ICMP echo command to an IP address in order to determine whether a network


connection exists to that node.




A. True





B. False


41. Which of the following best describes TCP/IP?




A. A static protocol

B.

A pro
prietary protocol

C.

A collection of internetworking protocols



42. UDP and TCP represent mechanisms used by which layer of the TCP/IP?




A. Data link layer




B. Physical layer



C. Presentation layer




D. Transport layer


43. ICMP, IP, AR
P, and RARP of the IP protocol suite map to:




A. OSI layers 1 and 2




B. OSI layer 5



C. OSI layer 3




D. OSI layer 2


44. Which layer is most important in providing reliable data exchange between two systems?




A. Physical layer





B. Data link layer



C. Session layer




D. Transport layer


45. Which of the following does TCP provide?




A. Unreliable data stream



B. Connectionless virtual circuit



C. Flow control




D. Structured byte stream movement


46. What is the sequence number in a TCP header used for?




A. Acknowledgments



B. Reordering of the octets received



C. Rejecting duplicate octets



D. All of the above


47. Variable sliding windows provide an explicit mechanism for not
ifying TCP if an


intermediate node (for example, a router) becomes congested?



A. True





B. False


48. LAN stands for which of the following?


A.

Long Area Network



B. Local Area Network

C. Local Arena Network



D. Local Area News


49.

WAN stands for

which of the following?


A.

WAN Area Network



B. Wide Arena Network

C. Wide Area Network



D. Wide Area News



50.


The two sublayers of the IEEE Data Link layer are which of the following?


A.

Data Link and MAC



B. Data Link and LLC

C. Logical Link Control an
d MAC


D. Logical and Link Control


51.

Bridges work at which layer of the OSI reference model?


A.

Session





B. Bridge

C. Network





D. Data Link




52.

Repeaters work at which layer of the OSI reference model?


A.

Transport





B. Presentation

C. Physical





D.
Data Link


53.

What is the Network layer of the OSI reference model responsible for?


A.

Bridging





B. Regenerating the digital signal

C. Routing Packets thru the internetwork

D. Gateway services


54.

Which three pairs of the following are Presentation layer stand
ards?


A.

MPEG and MIDI




B. PICT and JPEG

C. ASCII and EBCDIC



D. NFS and SQL


55.

Which of the following are Session layer standards?


A.

MPEG and MIDI




B. PICT and JPEG

C. ASCII and EBCDIC



D. NFS and SQL


56.

Which of the following are true statements about c
onnection oriented sessions?


A.

The segments delivered are acknowledged back to the sender upon their reception.

B.

Any segments not acknowledged are dropped.

C.

Segments are sequenced back into their proper order upon arrival at their destination.

D.

A manageable da
ta flow is maintained in order to avoid congestion, overloading, and the loss
of any data.


57.

CPE is an acronym for which of the following?


A.

Central Processing Engineer


B. Central Processing Equipment

C. Customer Processing Equipment


D. Customer Premise E
quipment


58.

CSU/DSU is an acronym for which of the following?


A. Channel Service Unit/Digital Service Unit

B.

Channel Service Unit/Data Service Unit

C.

Channel Service Unite/Digital Service Unit

D.

Can’t Send in Uniform/Don’t Send another Unit


59.

CO is an acronym for

which of the following?


A.

Company Office




B. Corporate Option

C. Central Office




D. Central Option


60.

Chose three reasons why the networking industry uses a layered model.


A.

It allows changes to occur in all layers when changing one protocol

B.

It allows ch
anges in one layer to occur without changing other layers

C.

It clarifies what general function is to be done rather than how to do it

D.

It clarifies how to do it rather than what general functions should be done

E.

It facilitates systematic troubleshooting


61.

Which
layer defines bit synchronization?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


62.

Which layer defines physical topology?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F
. Data link

G. Physical


63.

Which layer is responsible for putting 1s and 0s into a logical group?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


64.

Which layer is responsible for framing?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


65.

Which layer is responsible for addressing devices and routing through an internetwork?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F
. Data link

G. Physical


66.

Which layer hides details of any network
-
dependent information from the higher layers by providing
transparent data transfer?


A. Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physic
al


67.

Which layer is responsible for flow control, acknowledgment, and windowing?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


68.

Which layer is responsible for providing mechanisms for multiplexing up
per
-
layer application,
session establishment, and tear
-
down of virtual circuits?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


69.


Which layer is responsible for coordinating communication between syst
ems?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


70.

Which layer is responsible for negotiating data transfer syntax?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Da
ta link

G. Physical


71.

Which layer is responsible for synchronizing sending and receiving applications?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G.

Physical


72.

Which layer is responsible for identifying and establ
ishing the availability of the
intended communication partner?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G.

Physical


73.

Which layer is responsible for determining if sufficient resources for
the intended communication
exists?


A.

Application




B. Presentation

C. Session





D. Transport

E. Network





F. Data link

G. Physical


74. Which of the following protocols provide address resolution?




A. ICMP





B. RARP



C. IP






D. UDP

E.

TCP


75. IP is described as an unreliable mechanism because it does not guarantee delivery.



A. True





B. False