version 4.0 planning and cabling networks network fundamentals – chapter 10 sandra coleman, ccna,...
TRANSCRIPT
Version 4.0
PLANNIN
G AND C
ABLING
NETWORKS
NETWORK FUNDAMENTALS – CHAPTER 10SANDRA COLEMAN, CCNA, CCAI
OBJECTIVESIdentify the basic network media required to make a
LAN connection.
Identify the types of connections for intermediate and end device connections in a LAN.
– Identify the pin out configurations for straight-through and crossover cables.
- Identify the different cabling types, standards and ports used for WAN connections.
- Define the role of device management connections when using Cisco equipment.
Design an addressing scheme for an inter-network and assign ranges for hosts, network devices and the router interface.
Compare and contrast the importance of network designs.
BASIC NETWORK MEDIA REQUIRED TO MAKE A LAN CONNECTION
Select the appropriate hardware, including the cabling, to install several computers together in a LAN
SELECTING THE APPROPRIATE LAN DEVICE
RoutersAct as the gateway, connecting LANs to other networksPrimary devices used to interconnect networksEach port on a router connects to different networks – therefore requires a different subnet!Segments broadcast domainsSegments collision domainsInterconnect networks that use different technologies (LAN/WAN interfaces)LAN – usually UTP cabling, can be fiber.
HUBS VS. SWITCHESHubs – less expensive, used in a very small LAN where low throughput is OK
Switches – segments collision domains, interconnects network segments, more expensive, but performance makes it cost effective.
DEVICE SELECTION FACTORSPlanning ensures that all requirements and deployment options are
considered.
FACTORS TO CONSIDER WHEN CHOOSING A SWITCH
Cost – determined by its capacity (# ports) and features (security, manageability, etc.)
Redundancy – how much do you need to adequately protect your network.
CHOOSING ROUTERSSame considerations as a switch +
Expandability – can buy fixed and modular configurations. Modular provides expansion slots to increase flexibilty.OS features – security, QoS, VoIP, Multiple layer 3 protocols, special services (NAT, DHCP, etc.)Very expensive…get what you want initially to help keep costs to a minimum.
KNOW THE CABLE TYPESGiven a specific network connection, identify the type of cable
required to make the connection
TYPES OF MEDIAUTP – 100m
Fiber
Wireless
Each type has advantages/disadvantages:
Cable length, cost, bandwidth, ease of installation, susceptible to EMI/RFI
Attenuation: the decrease in signal strength along an electrical or optical cable.
WHY IS FIBER BETTER THAN COPPER?
Greater distance per cable run
Limited susceptibility to EMI/RFI
Greater bandwidth potential
Be able to identify cable and know what it is used for:
Straight thru – connecting unlike devices on different layers
Cross over – connecting like devices on same layer
Rollover – console connection from PC to switch/router
LAN CONNECTIONS
2 types of UTP interfaces
MDI (Media-dependent interface)– normal Ethernet pinout. Pins 1 & 2 Tx, pins 3 & 6 Rx. Computers, servers, & routers all have MDI connections.
MDIX (Media-dependent interface-crossover) – Swaps the Tx pairs internally which allows the end devices to be connected to a hub or switch with a straight-thru cable.
These can be setup by automatic detection and negotiating of MDI/MDIX operation of the port OR by enabling the mechanism to electrically swap the Tx & Rx pairs.
IDENTIFYING CABLE - KNOW THIS! 10.2.2Straight-thru – switch to router, PC to switch, PC to hub
Crossover – switch to switch/hub, hub to hub, router to router, pc to pc, pc to router (NIC to Ethernet port)
WAN CONNECTIONSFor V.35 serial cables: Uses DB 60, Winchester 15 pin, and smart serial connectors
CONFIGURING A ROUTER OR SWITCH
Uses a rollover cable to connect COM port to console interface on a router.
DESIGN AN ADDRESSING SCHEME FOR AN INTERNETWORK1st – KNOW the number of hosts you need on the network (pcs,
printers, servers, ip-phones, ip-camers, routers, switches, wireless access points, etc.) – look at the future!
Subnets? How many?
DESIGN AN ADDRESSING SCHEME FOR AN INTERNETWORKCalculate the address ranges for sub networks
LET’S PRACTICE!
LET’S DO THIS ONE!
IMPORTANCE OF NETWORK DESIGNSHow many subnets? What kinds of cable?
IMPORTANCE OF NETWORK DESIGNSDescribe how to count the segments between router interfaces
VLSM – YOU ARE NOW READY TO LEARN IT!I will give some examples on the board… be sure to write them
down… and work as many as possible.
You will have to use VLSM in your labs for this chapter. We will actually start designing IP addressing schemes, setting up the PC’s and routers, and making sure they all work
The labs we do in this chapter CLOSELY emulate what you will have to do for your hands-on final.
Just pay attention and you can do this… it is simply subnetting a subnet….don’t make it over-complicated!
ONE MORE TO GO!Test – TBD…
Online Test - discuss
Study guide – due on test dayPg. 264 – Multiple choice (2 questions)Pg. 266-267 – Multiple Choice (3 questions)Pg. 267- Concept questions (2 questions)Pg. 268 – Multiple Choice (3 questions)
Labs – 10-1, 10-2, 10-3 (you HAVE to know how to set this up)