network operating systems versus operating systems computer networks

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Network Operating Systems versus Operating Systems Computer Networks

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Page 1: Network Operating Systems versus Operating Systems Computer Networks

Network Operating Systems versus Operating

SystemsComputer Networks

Page 2: Network Operating Systems versus Operating Systems Computer Networks

Network Operating System (NOS)

NOS have dedicated servers Client server networksServers provide a variety of services for

other computers on the network

Page 3: Network Operating Systems versus Operating Systems Computer Networks

Operating System (OS)

Networks that don’t use NOS are peer-to-peer networks

Consists of client computersClient computers can also perform specific

server functions if they use special server software

Page 4: Network Operating Systems versus Operating Systems Computer Networks

File Sharing Peer-to-Peer (P2P)

Networked computers in a peer-to-peer LAN network can share:◦Hard drives◦File folders◦Internet access◦Network resources such as printers and fax

machines◦Examples, household, small office, students

Page 5: Network Operating Systems versus Operating Systems Computer Networks

Sharing on the Internet P2P

GlobalSharing on the web requires a special

software client like Napster, BitTorrent, etc.

Everything in the shared file is shared with other users

You don't see the names of users on the web

Page 6: Network Operating Systems versus Operating Systems Computer Networks

Security Methods (P2P)

Workgroups◦ Share files with others in the same workgroup◦ Password protected

Passwords◦ File security is the responsibility of the end user◦ Can set access rights to specific files and folders

Permissions– Read only, see but not edit– Write only/change, read, edit or add– Read and Write or Full access (edit or

delete)

Page 7: Network Operating Systems versus Operating Systems Computer Networks

Client Server/Dedicated Server

Has at least one computer that works only as a server

Run on a network operating system, such as Windows Server 2003 or 2008, linux or Unix

Page 8: Network Operating Systems versus Operating Systems Computer Networks

Types of servers

Web (HTTP) serverEmail serverProxy server (controls the entrance to a

LAN from the Internet and responsible for controlling IP addresses)

File serverApplication server (software programs)

Page 9: Network Operating Systems versus Operating Systems Computer Networks

Roaming Authentication

Log into any machine on the LAN and access same files and system settings, protected with a password

Page 10: Network Operating Systems versus Operating Systems Computer Networks

Network Address Translation

Proxy server is LAN gateway to InternetProtects the internal LAN by using two

different IP addresses: a public address that the Internet can see and a private one used on the LAN

The ISP (Internet Service Provider) provides the IP address(es) for the Internet

Proxy Server (using DHCP) assigns a different IP address for each computer on the LAN

Page 11: Network Operating Systems versus Operating Systems Computer Networks

Domain Name System (DNS)

On the Internet DNS stores the names for websites (google.com) and the web addresses that are linked to them

Translates the domain name into an IP address and finds the web host that stores the files

Page 12: Network Operating Systems versus Operating Systems Computer Networks

Windows Internet Naming System

Within a LAN, the comparable naming service is WINS

Names individual computer using NetBIOS: example “Laura’s Computer”

Page 13: Network Operating Systems versus Operating Systems Computer Networks

Mapping a Shared Drive

In a peer-to-peer network, if someone shuts his computer down, his files will no longer be available for others.

One benefit of using a client/server network is that files will always be available so long as the server is running.

When working off a server, you can also mount a shared network drive, so that it shows up under My Computer as if it were on the local machine.

Page 14: Network Operating Systems versus Operating Systems Computer Networks

IP Config Command

Using Command Prompt IP Congig will find the computer’s IP address

It will also show subnet masks that are assigned to different departments or sections