Osi Model Layers, Function, Hardware, Protocols And Standards

Front 1

Provides interface between software applications and network for interpreting application requests and requirements.

Back 1

Application Layer Function

Front 2

Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls

Back 2

Application Layer Hardware

Front 3

BOOTP, DHCP, DNS, FTP, HTTP, HTTPS, IMAP4, PING, POP3, NSLOOKUP, NTP, SFTP, SMTP, Telnet, TFTP

Back 3

Application Layer Protocols and Standards

Front 4

Application Layer Number

Back 4

7

Front 5

Allows hosts and applications to use a common language; performs data formatting, encryption, and compression

Back 5

Presentation Layer Function

Front 6

Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls

Back 6

Presentation Layer Hardware

Front 7

MIME, SSL, TLS

Back 7

Presentation Layer Protocols and Standards

Front 8

Presentation Layer Number

Back 8

6

Front 9

Establishes, Maintains, and Terminates user connections

Back 9

Session Layer Function

Front 10

Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls

Back 10

Session Layer Hardware

Front 11

RTP, SIP

Back 11

Session Layer Protocols and Standards

Front 12

Session Layer Number

Back 12

5

Front 13

Ensures accurate delivery of data through flow control, segmentation and reassembly, error correction, and acknowledgment

Back 13

Transport Layer Function

Front 14

Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls

Back 14

Transport Layer Hardware

Front 15

TCP, UDP

Back 15

Transport Layer Protocols and Standards

Front 16

Transport Layer Number

Back 16

4

Front 17

Establishes network connections; translates network addresses into their physical counterparts and determines routing

Back 17

Network Layer Function

Front 18

Routers, Layer 3 Switches, Firewalls, Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls

Back 18

Network Layer Hardware

Front 19

ARP, ICMP, IGMP, IP, IPSec, RARP

Back 19

Network Layer Protocols and Standards

Front 20

Network Layer Number

Back 20

3

Front 21

Packages data in frames appropriate to network transmission method

Back 21

Data Link Layer Function

Front 22

Bridges, Switches, Wireless access points, NICs, Modems, Cable Modems, DSL Modems, Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls

Back 22

Data Link Layer Hardware

Front 23

L2TP, PPP, PPTP, SLIP

Back 23

Data Link Layer Protocols and Standards

Front 24

Data Link Layer Number

Back 24

2

Front 25

Manages signaling to and from physical network connections

Back 25

Physical Layer Function

Front 26

Hubs, Repeaters, NICs, Modems, Cable Modems, DSL Modems

Back 26

Physical Layer Hardware

Front 27

IEEE 802.3 (Ethernet)
802.5 (Token Ring)
802.11 (Wi-Fi)

Back 27

Physical Layer Protocols and Standards

Front 28

Physical Layer Number

Back 28

1

Front 29

An Application layer protocol in the TCP/IP suite that uses a central list of IP addresses and their associated devices' MAC addresses to assign IP addresses to clients dynamically. It was the precursor to DHCP

Back 29

BOOTP (Bootstrap Protocol)

Front 30

An Application layer protocol in the TCP/IP suite that manages the dynamic distribution of IP addresses on a network. Using it to assign IP addresses can nearly eliminate duplicate-addressing problems.

Back 30

DHCP (Dynamic Host Configuration Protocol)

Front 31

A hierarchical way of tracking domain names and their addresses, devised in the mid-1980s. Its database does not rely on one file or even one server, but rather is distributed over several key computers across the internet to prevent catastrophic failure if one or a few computers go down. It is a TCP/IP service that belongs to the Application layer of the OSI model.

Back 31

DNS (Domain Name System or Domain Name Service)

Front 32

An Application layer protocol used to send and receive files via TCP/IP

Back 32

FTP (File Transfer Protocol)

Front 33

An Application layer protocol that formulates and interprets requests between Web clients and servers.

Back 33

HTTP (Hypertext Transfer Protocol)

Front 34

The URL prefix that indicates that a Web page requires its data to be exchanged between client and server using SSL encryption. Uses the TCP port number 443, rather that port 80

Back 34

(HTTP over Secure Sockets Layer)
HTTPS

Front 35

the most commonly used form of Internet Message Access Protocol (IMAP).

Back 35

(Internet Message Access Protocol, version 4)
IMAP4

Front 36

A TCP/IP troubleshooting utility that can verify that TCP/IP is installed, bound to the NIC, configured correctly, and communicating with the network. It uses ICMP to send echo request and echo reply messages that determine the validity of an IP address.

Back 36

(Packet Internet Groper)
PING

Front 37

The most commonly used form of the Post Office Protocol. An Application Layer protocol used to retrieve messages from a mail server. When a client retrieves mail via POP, messages previously stored on the mail server are downloaded to the client's workstation, and then deleted from the mail server.

Back 37

(Post Office Protocol, version 3)
POP3

Front 38

A TCP/IP utility that allows you to look up the DNS host name of a network node by specifying its IP address, or vice versa. This ability is useful for verifying that a host is configured correctly and for troubleshooting DNS resolution problems.

Back 38

NSLOOKUP

Front 39

A simple Application layer protocol in the TCP/IP suite used to synchronize the clocks of computers on a network. It depends on UDP for Transport layer services

Back 39

(Network Time Protocol)
NTP

Front 40

A protocol available with proprietary version of SSH that copies files between hosts securely. Like FTP, it first establishes a connection with a host and then allows a remote user to browse directories, list files, and copy files. Unlike FTP, it encrypts data before transmitting it.

Back 40

(Secure File Transfer Protocol)
SFTP

Front 41

The Application layer TCP/IP subprotocol responsible for moving messages from one e-mail server to another.

Back 41

(Simple Mail Transfer Protocol)
SMTP

Front 42

An Application layer protocol in the TCP/IP suite used to convey data regarding the statusof managed devices on a network.

Back 42

(Simple Network Management Protocol)
SNMP

Front 43

A terminal emulation protocol used to log on to remote hosts using the TCP/IP protocol. It resides in the Application layer of the OSI model.

Back 43

Telnet

Front 44

Application layer protocol that enables file transfers between computers. Unlike FTP, it relies on UDP at the Transport layer and does not require a user to log on to the remote host.

Back 44

(Trivial File Transfer Protocol) A TCP/IP
TFTP

Front 45

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

Back 45

(Multipurpose Internet Mail Extensions)
MIME

Front 46

A method of encrypting TCP/IP transmissions-including Web pages and data entered into Web forms-en route between the client and server using public key encryption technology.

Back 46

(Secure Sockets Layer)
SSL

Front 47

A version of SSL being standardized by the IETF (Internet Engineering Task Force). With it, the IETF aims to create a version of SSL that encrypts UDP as well as TCP transmissions. It, which is supported by new Web browsers, uses slightly different encryption algorithms than SSL, but otherwise is very similar to the most recent version of SSL.

Back 47

(Transport Layer Security)
TLS

Front 48

A Transport layer protocol used with voice and video transmission. it operates on top of UDP and provides information about packet sequence to help receiving nodes detect delay and packet loss. It also assigns packets a timestamp that corresponds to when the data int he packet was sampled from the voice or video stream. This timestamp helps the receiving node synchronize incoming data.

Back 48

(Real-time Transport Protocol)
RTP

Front 49

Which of the following is an example of a MAC address?

BB:BB:BB:BB:BB:BB:BB:BB
131.54.34.141
131.0.0.3
02:45:FD:1C:E6:31

Back 49

02:45:FD:1C:E6:31

Front 50

Prior to the OSI model different vendors

worked together to standardize products
transmitted data using the same set of rules
used a variety of transmission methods
had the same set of rules for data transmission

Back 50

used a variety of transmission methods

Front 51

Plug and Play compatibility refers to a function that

is not supported by the OSI Model
was first developed by IBM
requires user intervention or installation of software
None of the above.

Back 51

None of the above.

Front 52

If data is transmitted using a snychronous bit method, a _________ signal is part of the transmission.

start bit
end bit
timing
clocking

Back 52

clocking

Front 53

The OSI model was designed to provide

a standardized framework for data communications
a non-standard model for data processing
a framework for the Internet
a way of identifying uncommon elements that enabled transfer

Back 53

a standardized framework for data communications

Front 54

In the on state, a bit of data is set to

3
2
1
0

Back 54

1

Front 55

In an effort to predict future network needs, the ISO created the open model in beta format during the late

1960s
1970s
1980s
1990s

Back 55

1970s

Front 56

A timing function that allows devices to understand when the signal starts and stops is

bit synchronization
bit monitoring
coordinated transmission
None of the above.

Back 56

bit synchronization

Front 57

________ is a topology of a network that requires a central switch or a hub and drop cables to each node on the segment.

Mesh
Star
Bus
Ring

Back 57

Star

Front 58

ISO is an acronym for

International Services Organization
International Standards Organization
International Systems Office
None of the above.

Back 58

International Standards Organization

Front 59

Which of the following is an example of the type of information that may be included in the header?

source address
destination address
port number
All of the above.

Back 59

source address

Front 60

Which layer(s) is(are) involved in getting informaiton that you enter into an application on your computer transmitted across the network to another computer?

Application layer only
layers 1, 2, and 3 only
only the Transport layer
all layers

Back 60

all layers

Front 61

A category of digital encoding schemes is

amplitude
current-state encoding
phase shift keying
frequency shift keying

Back 61

amplitude

Front 62

The OSI Model contains _______ layers.

7
8
9
11

Back 62

7

Front 63

A function that moves a packet from the source machine to the destination machine across multiple networks is called a

router
connector
delivery connection
None of the above.

Back 63

router

Front 64

As data moves through different layers of the OSI model, each layer adds a

footnote
token packet
layer
header

Back 64

header

Front 65

Which of the following layers is responsible for handling the logical address of network devices and packet routing?

Data Link
Physical
Network
Transport

Back 65

Network

Front 66

At the Application (layer)level, the data is called

PDUs
packets
frames
bits

Back 66

PDUs

Front 67

Stress on a transmitted signal causes degradation which is known as

deflagration
distortion
attenuation
amplification

Back 67

attenuation

Front 68

Which of the following are clocking methods?

guaranteed state change
separate clock signals
over sampling
All of the above.

Back 68

over sampling

Front 69

The OSI model

specifies a framework for data transmission
defines specific criteria for protocols and devices
requires that vendors adhere to the characteristics of each layer
does not support Plug and Play

Back 69

specifies a framework for data transmission

Front 70

The OSI layer that turns data from upper layers into bits for transmission is called

Presentation
Transport
Data Link
Network

Back 70

Data Link

Front 71

There are _____ major topologies, excluding wireless.

8
6
4
2

Back 71

4

Front 72

When using baseband transmissions _________ use(s) the entire capacity of the media to send the data.

two signals
four signals
one signal
many signals

Back 72

one signal

Front 73

The purpost of the ISO is to _________ standards throughout the world.

eliminate
unify
revise
diversify

Back 73

unify

Front 74

A ________ signal allows the sending and receiving nodes to get in synch with each other and identify the beginning and enc of a transmitted message.

clocking
timing
end bit
start bit

Back 74

clocking