Linux Operating System

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Oct 26, 2013 (3 years and 9 months ago)

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A Practical Guide to Fedora and Red Hat Enterprise Linux

Unit 7:
Linux Network Services

Chapter 10:
Networking and the Internet


By Fred R. McClurg

Linux Operating System

©
Copyright
2012,
All Rights Reserved

Modern Web Browsers


Mozilla
:


Firefox (Web Browser)


Thunderbird (Email Client)


Opera (Mobile Browser)


Safari (
MacOS
)


Konqueror

(KDE File Manager &
Browser)


Chrome (Google)


Lynx (Text Only)


Internet Explorer (Windows)

Network Terminology


Internet: Network of networks that links
computers around the world



Intranet
: A network to connect computing
resources that are typically restricted to
internal users.



Firewall: Prevents certain types of traffic
from entering or leaving the network.



Transmission Control Protocol and Internet
Protocol (TCP/IP): The predominant
network protocol used by Linux systems.

Network Types


Broadcast Networks: Many systems
sending data at a time.


Cable Modem



Point to Point
: Only two end points
are involved.


Dial Up


DSL


T
-
1


T
-
3


ISDN

Network Terminology


Local Area Network (LAN): A
network confined to a relatively small
area like a computer facility, building
or campus.



Wide Area Network (WAN): A
network that covers a large
geographic area and is often used to
interconnect LANs.



Wireless Network: Allows multiple
users access to a point to point
connection via a radio frequency.

Network Hardware


Hub: Broadcasts every
packet to every port.



Switch: A type of intelligent
hub that sorts packets and
sends traffic only to the
machine it is intended for.

IP Addresses


IP Address: The unique address by which
each computer on the network is
identified.



Example (IPv4):


192.168.1.4


256
4

= 4,294,967,296



Example (IPv6):


fe80::3176:89b3:d62f:e05b%11


(16
4
)
8

= 10
36

(340
undecillion
)


Remote System Login


telnet
: Protocol for remote
login to Unix and non
-
Unix
systems.



ftp
: File Transfer Protocol


Method for downloading
and uploading files to
another system using
TCP/IP.

Testing Network Connection


ping
: Send a packet to a
remote computer.



traceroute
: Traces the
route a packet follows to
its
destination.

Trusted Systems


rcp
: Remote Copy


Allows a “trusted” system to
copy a file to another “trusted”
system.



rsh
: Remote Shell


Allows a user to login from one
“trusted” system to another
“trusted” system.