Networking
And other geeky things you never thought you’d learn
Job Description: Even though Salary was “unspecified” it pays over 400 grand per year!!!
Responsibilities
* Serve as member of the Global Network Team for Genworth Financial, a global business with more than 5,000 employees worldwide.
Perform LAN/WAN Hardware Installation, configuration and Management; The equipment includes Cisco routers, Cisco PIX, Nokia Checkpoints, Cisco switches, Big IP F5s, 3DNS F5, Cisco VPN devices and other networking gear.
* Act as primary network technical specialist supporting the separation of the network between GE and Genworth.
* Integrate Europe and Australia into the Genworth core network.
* Technical leader for BGP and EIGRP routing protocols and installation.
* Responsible for technical support and maintenance of Genworth Financial LAN/WAN, including capacity planning, tuning, router configurations, and troubleshooting the network and related devices.
* Evaluate network capacity and make upgrade recommendation in alignment with GNW strategies.
* Comply with change control processes.
APPLICATION
• Word Processing
• Graphics
• Spread Sheets
• Communications ( E-mail, Internet)
• Databases
• Games
• Each has its own format (i.e. Mp3, .doc, .xls)
Presentation
• “On the way down” changes data from application info to NETWORK info.
• This allows for independence from conflicts in different data presentations
• It also “encrypts” the data for travel over a network
• Unencrypted Data is called “Plain Text”
Session
• The Three Way Handshake
• “The Phone Call” of Networking
• Think of your old Dial Up Access
• If Dial Up is still new to you, think of the old operators
• Also terminates session
Transport/Transfer• TCP ( Transmission Control Protocol)
• Sliding Window
• How Big of “Bytes” to take
• The firehose and the drinking fountain
• “X-on X-off ”
• Buffer ( Wax on Wax off?)
• Show me the T3 !!!
• Error recovery
Network
• Here’s where Cisco makes the money!
• Switching and Routing and Packets OH MY!
• Forwarding and Hops
• LAN’s, WAN’s and Wi-Fi ( no Ron, not Hi-Fi)
• IP address more on this later !
Data-Link Layer• Device Permission to receive data (MAC number) and send it
• error checking
• Flow control…..the long and painful phone conversation
• FRAMES
Physical
• The Hardware
• 0’s and 1’s
• Electric Light Orchestra
Terms to know• Static IP
• Dynamic IP
• VPN ( virtual private network )
• Subnetting
• Ports
• VOIP ( Voice over IP )
• Ethernet
• Cat 5
MORE terms to know
• Digital
• Analog ( almost outdated )
• Switch
• Router
• Fiber (Not a Bran Muffin)
• Ports
Cutting Edge• SIP Phones ( Session Initiated Protocol)
• Digital Guitar
• PVR’s ( a video iPod?)
• Household Gadget IP’s
• Are you kidding me?
• Windows with a twist!
• Smart Rooms !
• CSI in real life!
It Takes Two
• Let’s stop and look at Binary Octets( A great name for a retro punk band don’t you think?)
IP- Therefore I AM
150.215.17.9 10010110.11010111.00010001.00001001
150.215.0.0 = The network name 10010110.11010111.00000000.00000000150.215.255.255= the “Broadcasting
Network” 10010110.11010111.11111111.11111111
Subnetting for “Cheaters”
• “Borrowing” Bits
10010110.11010111.00000000.00000000 network Users
10010110.11010111.00000000.00000000 borrowIP=150.215.0.0Subnet= 255.255.240.0
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