ccna 2 Flashcards
PAN and range
personal area network and .1m
LAN and range
Local Area Network and 10, 100, 1000 m or 1km
WAN and range
Wide Area Network and 100,000, 1,000,000, 10,000,000 , 100,000,000 or 100,000km
There are 2 type of devices:
end-user devices and network devices.
what are the network devices
Repeater: regenerate a signal.
* Hub: concentrate connections and may
regenerate a signal.
* Bridge: convert network transmission
data formats as well as perform basic
data transmission management.
* Switch: add more intelligence to data
transfer management.
* Router: routing and other services
regenerate a signal.
Repeater:
concentrate connections and may generate signal
Hub:
convert network transmission
data formats as well as perform basic
data transmission management.
Bridge:
routing and other services
Router:
two types of network topology
- The physical topology, which is the actual
layout of the wire or media. - The logical topology, which defines how the
media is accessed by the hosts for sending
data.
which is the actual layout of the wire or media.
- The physical topology,
, which defines how the
media is accessed by the hosts for sending
data.
The logical topology
are collections of protocols
that enable network communication from one
host through the network to another host.
Protocol suites
is a formal description of a set of
rules and conventions that govern a particular
aspect of how devices on a network
communicate.
A protocol
Operate within a limited geographic area
LANs
LAN devices and technology
– Ethernet
– Token Ring
– FDDI
Operate over a large geographically separated areas
WAN
WANs
– Analog modems
– Integrated Services Digital Network (ISDN)
– Digital Subscriber Line (DSL)
– Frame Relay
– Asynchronous Transfer Mode (ATM)
– T (US) and E (Europe) carrier series: T1, E1, T3, E3
– Synchronous Optical Network (SONET)
MAN
Metropolitan-Area Network
is a
network that spans
a metropolitan
area such as a city
or suburban area.
MAN
usually
consists of two or
more LANs in a
common
geographic area.
A MAN
SAN
Storage Area Network
is a dedicated,
high-performance
network used to move
data between servers
and storage resources.
A SAN
VPN
Virtual Private network
is a private
network that is
constructed within a
public network
infrastructure such as
the global Internet .
A VPN
is the most cost-
effective method of
establishing secured
connection
VPN
types of vpn
Access VPNs
* Intranet VPNs
* Extranet VPNs
Importance of bandwidth
1 it is finite
2 it can save money
3 it is a key measure of network design and performance
4 it is the key to understanding the internet
5 demand for it increases constantly
is the measure of how much
information, or bits, can flow from one place to
another in a given amount of time, or seconds.
Bandwidth
refers to actual measured
bandwidth, at a specific time of day, using
specific Internet routes, and while a specific
set of data is transmitted on the network.
Throughput
– What are the source and the destination of a communication
process?
Addresses
– Where does the communication take place?
Media
– How to make the communication process effectively?
Protocols
OSI reference model
*All People Seem To Need Data Processing
Application
presentation
session
transport
network
data link
physical
DARPA
Defense Advance
Research Projects Agency
TCP/IP model
Application
transport
internet
network access
add more intelligence to data
transfer management.
Switch:
