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Unit 5: Connecting to Internet
Mithilesh Kumar Dubey, Lovely Professional University

unit 5: connecting to internet notes

contents
Objectives
Introduction
5.1 Network Configuration Tool

5.2 Connecting to LAN
5.3 Summary
5.4 Keyword
5.5 Self Assessment
5.6 Review Questions

5.7 Further Readings

objectives

After studying this unit, you will be able to:
l z Understand network configuration tools

l z Discuss connection with LAN
introduction

This unit covers TCP/IP networking, network administration and system configuration basics.
Linux can support multiple network devices. The device names are numbered and begin at zero
and count upwards. In Linux, each network device has it’s own name. Ethernet devices will
typically have names such as ‘eth0’ or ‘eth1’. Dial-up connections typically have names such as
‘ppp0’, and some wireless lan cards might have names like ‘wlan0’.

5.1 Network Configuration Tool

Linux can support multiple network devices. The device names are numbered and begin at zero
and count upwards.

Example: A computer running two ethernet cards will have two devices labeled /dev/
eth0 and /dev/eth1.

Linux TCP/IP Network Configuration Files

file Description
/etc/resolve.conf List DNS servers for internet domain name
resolution.
Manual page for: /etc/resolv.conf
/etc/hosts Lists hosts to be resolved locally (not by DNS).
Manual page for: /etc/hosts
Contd...

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