Cit 470 advanced network and system administration
Download
1 / 18

CIT 470: Advanced Network and System Administration - PowerPoint PPT Presentation


  • 117 Views
  • Uploaded on

CIT 470: Advanced Network and System Administration. Networks. Topics. Network Topology Structured Cabling Simple Host Routing Overlay Networks Monitoring. Network Topology.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'CIT 470: Advanced Network and System Administration' - lulu


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Cit 470 advanced network and system administration

CIT 470: Advanced Network and System Administration

Networks

CIT 470: Advanced Network and System Administration


Topics
Topics

  • Network Topology

  • Structured Cabling

  • Simple Host Routing

  • Overlay Networks

  • Monitoring

CIT 470: Advanced Network and System Administration


Network topology
Network Topology

Arrangement of network elements, showing physical or logical interconnections between nodes. Does not include info about:

  • Distance

  • Transmission rates

  • Protocols

  • Cabling types

CIT 470: Advanced Network and System Administration


Star topology
Star Topology

  • Network connected to a central node using a single link.

  • All data transmitted between nodes goes through central node.

  • Easy to understand, simple, affordable.

  • Single point of failure.

CIT 470: Advanced Network and System Administration


Ring topology
Ring Topology

  • Each node is connected to two other nodes, with first and last node connected to each other.

  • All devices have two connections to network, so any link can fail w/o causing a problem.

  • Dual ring has two connections to each node.

CIT 470: Advanced Network and System Administration


Structured cabling
Structured Cabling

Telecom cabling infrastructure consisting of

  • Entrance facilities: where building interfaces to ouside world.

  • Equipment room: more complex equipment (routers, major cable terminations.)

  • Building backbone: star topology providing access to all wiring closets, equipment rooms, and entrance facilities.

  • Telecom closet: wiring closet where horizontal cable for floor is terminated.

  • Horizontal cabling: extends from telecom closet to end user devices in the work area.

  • Work area: office space, labs, etc. where computers and other equipment are located.

CIT 470: Advanced Network and System Administration


Wiring closets
Wiring Closets

  • Small room where

  • cables are connected

  • from main network to

  • local devices, a/k/a

  • a distribution frame.

  • Needs:

    • Reliable power

    • A/C

    • Physical security

CIT 470: Advanced Network and System Administration


Idfs and mdfs
IDFs and MDFs

Intermediate Distribution Frame (IDF)

  • One per floor.

  • Connects end users to network.

    Main Distribution Frame (MDF)

  • Connects all the MDFs.

  • Often located in data center.

CIT 470: Advanced Network and System Administration


Patch panel
Patch Panel

A panel that houses cable connections.

  • Front: short patch cables.

  • Back: longer permanent cables.

    Allows you to change cable path w/o new cables.

CIT 470: Advanced Network and System Administration


Patch panel1
Patch Panel

CIT 470: Advanced Network and System Administration


Star topology cabling
Star Topology Cabling

CIT 470: Advanced Network and System Administration


Star topology wiring advantages
Star Topology Wiring Advantages

  • Central wiring hubs make it easier to move, add, or change cabling.

  • Central cabling points allow faster troubleshooting.

  • Independent point to point links prevent cable problems from affecting other links.

  • Central wiring hubs can allow easier upgrades to new technologies.

CIT 470: Advanced Network and System Administration


Cabling contractors
Cabling Contractors

  • Cabling an entire building is a major project.

  • Cable contractors know how

    • Plan cabling for an entire building

    • Estimate cabling and install hosts

    • Structured cable standards

    • Electrical safety standards

    • Fire safety standards

CIT 470: Advanced Network and System Administration


Documentation
Documentation

  • Logical map

    • Logical network topology

    • Network numbers, names, speeds

  • Labeling

    • Label both ends of each cable.

    • Cables can be difficult to label, but manufacturers will print serial numbers.

    • Include text comment on each interface in router/switch software.

CIT 470: Advanced Network and System Administration


Simple host routing
Simple Host Routing

Machines with one NIC only need two routes:

  • Local subnet: direct connection.

  • Everything else goes to local gateway router.

    Don’t enable routing protocols on PCs.

  • Makes networking more complex.

  • Decreases network performance w/ broadcasts.

  • Badly configured PC can send bad routes to other PCs and routers, breaking network.

CIT 470: Advanced Network and System Administration


Overlay networks
Overlay Networks

A logical topology on top of physical topology.

  • VPN: connect remote users/sites to main site as if a single secure WAN existed over Internet.

  • VLAN: treat any connection as belonging to any subnet, no matter what the physical cabling is like. Eliminates need to recable to move machines to different subnets.

CIT 470: Advanced Network and System Administration


Monitoring
Monitoring

Need two types of monitoring

  • Real-time alerts: alert when network interface goes up or down, heavy load, security, etc.

  • Historical trends: record overall network usage in order to plan for future capacity and detect behavorial abnormalities before they become problems.

CIT 470: Advanced Network and System Administration


References
References

  • Thomas A. Limoncelli, The Practice of System and Network Administration, 2nd ed, Addison-Wesley, 2007.

  • Kennedy Clark and Kevin Hamilton, Cisco LAN Switching, Cisco Press, 1999.

  • Charles E. Spurgeon, Ethernet: The Definitive Guide, O’Reilly, 2000.

  • John Vacca, The Cabling Handbook, 2nd ed, Pearson PTR, 2000.

CIT 470: Advanced Network and System Administration