Tài liệu Chapter 10 - Planning and Cabling Networks CCNA Exploration 4.0 ppt

CCNA Exploration 4.0
Chapter 10 - Planning
and Cabling Networks
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Overview
• Identify 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.
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- 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
LANs – Making the Physical
Connections
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Connections
Basic Network Media Required to Make a LAN Connection
• Select the appropriate hardware, including the cabling,
to install several computers together in a LAN
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Router:
• interconnect two LAN
• interconnect a LAN

and a WAN
Basic Network Media Required to Make a LAN Connection
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Hubs: for small LAN
Switches: for LAN
• Number of factors that need to be considered
Basic Network Media Required to Make a LAN Connection
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Basic Network Media Required to Make a LAN Connection
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Cost
• The cost of a switch is determined by: capacity (port available and
switching speed), features, network management capabilities, security
technologies, and optional advanced switching technologies.
• "cost per port" calculation, cable length.
• The invest in redundancy. The effect if there are problems with a single
central switch.
Basic Network Media Required to Make a LAN Connection
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Speed and Types of Ports/Interfaces
• The speed : 10/100/1000 Mbps. Can increased speeds without replacing
the devices.
• The number and type of ports:
– Just enough ports for today's needs?
– A mixture of UTP speeds?
– Both UTP and fiber ports?
• The number of UTP ports and fiber ports will be needed. The number of
1 Gbps ports and 10/100 Mbps ports.
Factors to Consider in Choosing a Router
• Similar to the switch, cost and interface types and speeds must be

considered as well. Additional factors:
– Expandability
– Media
– Operating System Features
Expandability
Basic Network Media Required to Make a LAN Connection
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Expandability
• Fixed configurations
• Modular devices
• Most modular devices come with a basic number of fixed ports as well
as expansion slots.
• Select the appropriate modules and interfaces for the specific media.
Operating System Features
• features and services such as:
– Security
– Quality of Service (QoS)
– Voice over IP (VoIP)
– Routing multiple Layer 3
Basic Network Media Required to Make a LAN Connection
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– Routing multiple Layer 3
protocols
– Special services such as NAT
and DHCP
• The budget is an important
consideration. The media used to
connect to the router should be
supported without needing to
purchase additional modules.

Device interconnections
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Types of Connections in a LAN
Four physical areas to
consider:
• Work area
• Telecommunications
room, also known as the
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room, also known as the
distribution facility
• Backbone cabling, also
known as vertical cabling
• Distribution cabling, also
known as horizontal
cabling
Types of Connections in a LAN
• Total Cable Length
– Attenuation phenomenon.
– For UTP: spans four areas, maximum distance is 100
meters per channel. Up to 5 meters of patch cable for
interconnecting patch panels as well as cable from the
cable termination point on the wall to the telephone or
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cable termination point on the wall to the telephone or
computer.
• Work Areas
– EIA/TIA standard: From end devices to the wall jacks
have a maximum length of 10 meters.
– Straight-through cable and crossover cable is typically

used.
Types of Connections in a LAN
Telecommunications Room
• Is where connections to intermediary devices take place. Contains the
intermediary devices - hubs, switches, routers, and data service units
(DSUs) - that tie the network together. These devices provide the
transitions between the backbone cabling and the horizontal cabling.
• Patch cords connects between the patch panels and the intermediary
devices. Patch cables also interconnect these intermediary devices.
• Also contains the servers used by the network.
Horizontal Cabling
•
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Horizontal Cabling
• To connect the telecommunication rooms with the work areas, 90
meters max.
Backbone Cabling, or vertical cabling
• To connect the telecommunication rooms to the equipment rooms,
where the servers are often located. Also interconnects multiple
telecommunications rooms. Sometimes routed outside the building to
the WAN connection or ISP.
• Are used for aggregated traffic. Backbones typically require high
bandwidth media such as fiber-optic cabling.
Types of Connections in a LAN
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Types of Media: factors to consider
• Cable length
• Cost
• Bandwidth
• Ease of installation

• Susceptible to EMI/RFI
Types of Connections in a LAN
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Example: User location
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Types of Connections in a LAN
Cable Length
• The total length: from the end devices to the intermediary device
(includes from devices to wall plug, from wall plug to cross-connecting
point, or patch panel, and from patch panel to the switch).
• The longer the media, the more attenuation will affect the signal.
Cost
• Vary from media type to media type, and the staff might not realize the
impact on the budget.
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impact on the budget.
Bandwidth
• Carefully consider the bandwidth requirements depends on devices
(server or single user).
• Currently, the technology used in fiber-optic media offers the greatest
bandwidth available among the choices for LAN media. Wireless is
also supporting huge increases in bandwidth, but it has limitations in
distance and power consumption.