Chapter One

Front 1

external factors affecting communication??

Back 1

1--The quality of the pathway between the sender and the recipient

2--The number of times the message has to change form

3--The number of times the message has to be redirected or readressed

4--The number of other messages being transmitted simultaneously on the communication network
The amount of time allotted for successful communication

Front 2

Internal factors that interfere with network communication are related to the nature of the message itself.

Back 2

Internal factors affecting the successful communication across the network include:

1--The size of the message

2--The complexity of the message

3--The importance of the message

Front 3

These data or information networks vary in size and capabilities, but all networks have four basic elements in common:

Back 3

1--Rules or agreements to govern how the messages are sent, directed, received and interpreted.

2--The messages or units of information that travel from one device to another

3-A means of interconnecting these devices - a medium that can transport the messages from one device to another

4-Devices on the network that exchange messages with each other

Front 4

Four elements of a network

Back 4

Rules
Medium
Messages
Devices

Front 5

Switch

Back 5

the most common device for interconnecting local area networks

Front 6

Firewall

Back 6

provides security to networks

Front 7

Router

Back 7

helps direct messages as they travel across a network

Front 8

Wireless Router

Back 8

a specific type of router often found in home networks

Front 9

Cloud

Back 9

used to summarize a group of networking devices, the details of which may be unimportant to the discussion at hand

Front 10

Serial Link

Back 10

one form of WAN interconnection, represented by the lightning bolt-shaped line

Front 11

Protocals--
Http
SMTP&POP3
XMPP&OSCAR
SIP

Back 11

World wide web
Email
Instant messenger
IP Tepephone

Front 12

Phone,TV,Internet all had there own network in a?

Back 12

Multiple services==multiple networks

Front 13

Pnone,TV,internet can all use the same network in a?

Back 13

Converged network

Front 14

These rules, or protocols, must be followed in order for the message to be successfully delivered and understood. Among the protocols that govern successful human communication are:

Back 14

1--An identified sender and receiver

2--Agreed upon method of communicating (face-to-face, telephone, letter, photograph)

3--Common language and grammar

4--Speed and timing of delivery

5--Confirmation or acknowledgement requirements

Front 15

we are discovering that there are four basic characteristics that the underlying architectures need to address in order to meet user expectations:

Back 15

fault tolerance, scalability, quality of service, and security.

Front 16

fault tolerance

Back 16

If one link or path fails, processes ensure that messages can be instantly routed over a different link transparent to the users on either end

Front 17

scalability

Back 17

A scalable network can expand quickly to support new users and applications without impacting the performance of the service being delivered to existing users.

Front 18

quality of service(QOS)

Back 18

Different layers
1-live video feeds
2-phone
3-web sites-- if the website has a lower priority than the phone it can drop and the user just clicks again to get the website a phone call can not drop

Front 19

Security

Back 19

umm securing the network from unauthorized ppl i.e. EX CONS like me

Front 20

Circuit Switched Connection-oriented Networks

Back 20

OLD PHONE LINES-once a circuit is established, even if no communication is occurring between the persons on either end of the call, the circuit remains connected and resources reserved until one of the parties disconnects the call

Front 21

Packet Switched Connectionless Networks

Back 21

The premise for this type of networks is that a single message can be broken into multiple message blocks. The premise for this type of networks is that a single message can be broken into multiple message blocks

Front 22

Data integrity

Back 22

Having the assurance that the information has not been altered in transmission, from origin to destination.

Front 23

Source integrity

Back 23

is the assurance that the identity of the sender has been validated. Source integrity is compromised when a user or device fakes its identity and supplies incorrect information to a recipient.

Front 24

The use of what provide source and data integrity across a network to prevent unauthorized modification of information.

Back 24

digital signatures, hashing algorithms and check sum

Front 25

three major trends that are contributing to the future shape of complex information networks:

Back 25

Increasing number of mobile users

Proliferation of network capable devices

Expanding range of services