LANs made simple. 2 network devices connected to share resources.

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Presentation transcript:

LANs made simple

2 network devices connected to share resources.

2 network devices connected to share resources that are geographically close! e.g. room, building, site

Anything with a Network Interface Card (NIC) Computer Modem Printer Router Switch Mobile Device All these can have a NIC:

Wireless Wired CAT5 Coaxial Fibre AdvantagesDisadvantagesAdvantagesDisadvantages InexpensiveSlowerFasterMessy cables “Clean” lookLess secureMore secureCables need to be laid PortableUnreliable connection Constantly connected Cable can be faulty

CAT5 Coaxial Fibre  Alias - 10Base2 and 5  Speed - 10megabits per second (Mbps)  Distance – 500 metres  Alias – Ethernet; 10BaseT  Cat5 – 10/100 Mbps  Cat5e/Cat6 – 1000 Mbps  Distance metres  Speed - 1 Gbps - 50 Gbps  Distance - Kilometres

CAT5 Coaxial Fibre Q – Which cable can be run further? Q – Which cable is slowest? Q – Which cable can be run the least distance?

Examples of resources shared on a LAN to save money are: Printer Files Internet Games Applications

Both are LANs Only difference is one has a Server

Intel ® Xeon ® Processor E GHz, 2nd Intel ® Xeon ® Processor E GHz, 8MB Cache, 4.8 GT/s QPI, 4C 8GB Memory (4x2GB), 1333MHz, Single 500GB 7.2K RPM SATA 3.5 " Hot Plug Hard Drive Faster Hardware Advanced Security Dedicated

Internet Games Printer Applications Files Client requests resources Server shares resources

Who will act as the ?? SERVER ?? Peers are “the same”Basic Security With basic Hardware Designed to request only

Internet Games Printer Applications Files One peer requests resources Another peer is configured to share resources

 Peer to Peer networks are cheaper – yay!  Easier to manage – yay!  Quicker to set up – yay! SO…  All these advantages, are become the disadvantages of a Client/Server LAN:  Expensive – Boo!  Complex to manage – Boo!  Difficult to configure – Boo!

 All the advantages of a Client/Server LAN:  Advanced security – Yay!  Increased performance – Yay!  Able to share resources to many clients – Yay! Become the Peer to Peer disadvantages:  Limited security – Boo!  Poor performance – Boo!  Can only share with less than 10 clients – Boo!

Modem Laserjet Router Switch Inkjet Hub Would you use these on a Peer to Peer OR Client/Server LAN? Computer Mobile Device

Modem Laserjet Router Switch Inkjet Hub Peer to Peer: Computer Mobile Device Client/Server:

 This is the basics of PHYSICALLY connecting LANs  There is now the LOGICAL connecting of LANs to be covered in another power point. ◦ Protocols:  TCP/IP  DHCP  ICMP  NAT  IP Addressing  Static vs Dynamic  CSMA/CD