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LDCE Data network > OSI, TCP/IP > Flashcards

OSI, TCP/IP Flashcards

1
Q

ISO-OSI layers 1,2,3 together called
1) network support layers
2) user support layers

A

network support layers

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2
Q

ISO-OSI layers 5,6,7 together called
1) network support layers
2) user support layers

A

user support layers.
they allow interoperability among unrelated software systems

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3
Q

________ensures end-to-end reliable data transmission
1) Data link layer
2) Network Layer
3) Transport layer

A

ransport layer

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4
Q

Entities in the same layer on different computers are called _______ entities
1) peer
2) equivalent

A

peer

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5
Q

OSI interface data unit (IDU) consists of
1) protocol data unit (PDU)
2) interface control information (ICI)
3) both

A

both

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6
Q

________ layer defines the direction of transmission between two devices: simplex, half-duplex etc
1) Physical layer
2) Data link layer
3) Network Layer

A

Physical layer

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7
Q

________ layer defines the network topology star, mesh etc.
1) Physical layer
2) Data link layer
3) Network Layer

A

Physical layer

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8
Q

____ is responsible for node-to-node delivery
1) Physical layer
2) Data link layer
3) Network Layer

A

Data link layer

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9
Q

____ is responsible for source-to destination delivery
1) Physical layer
2) Data link layer
3) Network Layer
4) Transport layer

A

Network Layer

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10
Q

______ ensures that messages are delivered error-free, in sequence, and
with no losses or duplications
1) Physical layer
2) Data link layer
3) Network Layer
4) Transport layer

A

Transport layer

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11
Q

_______ can be either connectionless or connection-oriented.
1) Physical layer
2) Data link layer
3) Network Layer
4) Transport layer

A

Transport layer

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12
Q

Error control is performed in
1) Physical layer
2) Data link layer
3) Network Layer
4) Transport layer

A

2 and 4
Data link layer - across a link
Transport layer - end to end

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13
Q

_______ is the network dialog controller
1) Network Layer
2) Transport layer
3) Session layer
4) Presentation layer

A

Session layer

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14
Q

________ allows a process to add checkpoints (synchronization points) into a stream of data.
1) Network Layer
2) Transport layer
3) Session layer
4) Presentation layer

A

Session layer

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15
Q

______ allows the communication between two processes to take place either in half-duplex or full-duplex
??

A

Session layer
(dialog control)

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16
Q

_________is concerned with the syntax and semantics of the information
exchanged between two systems.
1) Transport layer
2) Session layer
3) Presentation layer
4) Application Layer

A

Presentation layer

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17
Q

____ allows encryption, decryption and compression
1) Transport layer
2) Session layer
3) Presentation layer
4) Application Layer

A

Presentation layer

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18
Q

no headers or trailers are added at this layer
1) Transport layer
2) Session layer
3) Presentation layer
4) Application Layer

A

Application Layer

19
Q

______ allows FTAM
1) Transport layer
2) Session layer
3) Presentation layer
4) Application Layer

A

Application Layer
File transfer, access, and management (FTAM)

20
Q

The TCP/IP protocol suite
maps to a four-layer conceptual model known as the _______ model
1) DAPRA
2) DARPA

A

DARPA
named after the U.S. government agency that initially developed TCP/IP.

21
Q

TCP four layers are
Application,
Transport,
Network or Internet
and __
1) Physical
2) Data link or network interface

A

Data link or network interface

22
Q

________ resolves the network layer address to a link layer address such as a hardware address.
1) TCP
2) ARP
3) ICMP
4) IGMP

A

Address Resolution Protocol (ARP)

23
Q

_____ reports errors and other information to help you diagnose unsuccessful packet delivery.
1) TCP
2) ARP
3) ICMP
4) IGMP

A

Internet Control Message Protocol (ICMP)

24
Q

______ manages IP multicast groups.
1) TCP
2) ARP
3) ICMP
4) IGMP

A

Internet Group Management Protocol (IGMP)

25
Q

In terms of the OSI model, IP is a network-layer protocol. It provides a datagram service between pplications, supporting ______
1) TCP
2) UDP

A

both TCP and UDP.

26
Q

In terms of the OSI model, IP is a ________ layer protocol.
1) Physical layer
2) Data link layer
3) Network Layer
4) Transport layer

A

Network Layer

27
Q

________ provides a one-to-one, connection-oriented, reliable communications service.
1) TCP
2) UDP

A

TCP

28
Q

_____provides a one-to-one or one-to-many, connectionless, unreliable communications service
1) TCP
2) UDP

A

UDP

29
Q

TCP/IP internet layer protocol(s)
1) ARP
2) ATM
3) SNMP
4) ICMP

A

ARP and ICMP
ATM - network interface layer
SNMP - Application layer

30
Q

TCP/IP transport layer protocol(s)
1) ARP
2) UDP
3) TCP
4) DNS

A

UDP and TCP
ARP - internet layer
DNS - Application layer

31
Q

TCP/IP net work interface layer protocol(s)
1) RIP
2) Ethernet
3) Frame relay
4) IGMP

A

Ethernet and frame relay
RIP - Application layer
IGMP - internet layer

32
Q

TCP/IP application layer protocol(s)
1) SNMP
2) HTTP
3) IGMP
4) ATM

A

SNMP and HTTP
IGMP - internet layer
ATM - network interface layer

33
Q

_______ retransmits lost data
1) TCP
2) UDP

A

TCP only

34
Q

_______ is/are a connectionless
1) TCP
2) UDP
3) IP

A

UDP and IP

35
Q

port number 80 for
1) HTTP
2) SMTP
3) FTP
4) SFTP

A

HTTP

36
Q

The Well Known Ports are those in the range _____
1) 0 - 255
2) 0 - 511
3) 0- 1023

A

0- 1023
The Well Known Ports are assigned by the IANA (Internet Assigned Numbers Authority) for major protocols.

37
Q

The Well Known Ports are assigned by
1) ISO
2) IANA
3) ITU
4) ICANN

A

IANA (Internet Assigned Numbers Authority) for major protocols.

38
Q

The Registered Ports are those in the range
1) 1024-2047
2) 1024- 49151
3) 49152 - 65535
4) 1024 - 65535

A

1024 - 49151

39
Q

The Private Ports are those in the range
1) 1024-2047
2) 1024- 49151
3) 49152 - 65535
4) 1024 - 65535

A

49152 - 65535

40
Q

port number 20 for
1) HTTP
2) SMTP
3) FTP
4) SFTP

A

20 - FTP data
21 - FTP control

41
Q

port number 25 for
1) HTTP
2) SMTP
3) FTP
4) SFTP

A

SMTP
Simple Mail Transfer Protocol

42
Q

TCP allows
1) a record-oriented
2) a block transfer
3) an image transfer

A

all of these
record oriented transfer(one record at a time) ,
block transfer (which moves chunks of a file)
image transfer (which does not look in any way at the file contents).

43
Q

TELNET data is
1) encrypted and safe
2) not encrypted and unsafe

A

not encrypted and unsafe
- use Putty to connect via SSH

44
Q

MIME stands for

A

Multipurpose Internet Mail Extensions

LDCE Data network (6 decks)

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