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15 Planning, Implementing,
and Maintaining a Network
Infrastructure (2.0)
The planning phase of deploying a network infrastructure is by far the most
important
part of the process. When building a large network, it is crucial that you
have the entire
infrastructure planned before you purchase hardware or construct the
network. The
plan should specify elements such as the protocols the network will use and
the phys-
ical topology of the network.
The Transmission Control Protocol/Internet Protocol (TCP/IP) suite is the
industry stan-
dard for network communications, and creating an effective TCP/IP
infrastructure is a
primary element of designing and planning a network. A TCP/IP network
infrastructure
plan specifies how you are going to subnet your network, what Internet
Protocol (IP)
addresses and subnet masks you will use, what names to assign to your
computers,
and how the computers will resolve these names into IP addresses.
Once you have finished deploying the network and have it up and running, the
focus
of the administrator’s job changes to maintenance and troubleshooting.
Problems with
TCP/IP configuration and name resolution are common, and you must be
familiar with
the tools and techniques that can help determine the causes of the problems
and cor-
rect them.
Tested Skills and Suggested Practices
The skills that you need to successfully master the Planning, Implementing,
and Main-
taining a Network Infrastructure objective domain on the 70-293 exam
include:
■
Plan a TCP/IP network infrastructure strategy.
❑
Practice 1: Practice converting 8-bit binary numbers into decimals without
using a calculator or other electronic aid.
❑
Practice 2: Create a series of IP addressing scenarios in which you must
sub-
net a network address by creating a specified number of subnets, each con-
taining a specified number of hosts. Then, using paper and pencil only,
calculate the IP addresses and the subnet mask for each subnet.
15-1
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