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IT professionals who work for medium to large companies as system or network administrators often have the worst of both worlds You are stuck with a network struc ture designed by a consultant who took the money and ran (I should know: I was that consultant) At the same time, if you think your job won t involve some design, think again Your organization wants to switch to private Internet Protocol (IP) address ing You have to summarize the four (if you re lucky, try it with three) Class C subnets that your company leases Internally, you need to subnet different sized subnets, so wipe the dust off the Variable Length Subnet Masking (VLSM) textbook Creating an effective Transmission Control Protocol/Internet Protocol (TCP/IP) infrastructure is one of the primary elements of network design and planning.

develop the project in increments, or use fewer people and a longer schedule or more people and a shorter schedule. One of the scariest exchanges I ve ever heard was at a lecture on managing software projects. The speaker was the author of a best-selling software-projectmanagement book. A member of the audience asked, What do you do if management asks for an estimate and you know that if you give them an accurate estimate they ll say it s too high and decide not to do the project The speaker responded that that was one of those tricky areas in which you had to get management to buy into the project by underestimating it. He said that once they d invested in the first part of the project, they d see it through to the end. Wrong answer! Management is responsible for the big-picture issues of running a company. If a certain software capability is worth $250K to a company and you estimate it will cost $750K to develop, the company shouldn t develop the software. It s management s responsibility to make such judgments. When the speaker advocated lying about the project s cost, telling management it would cost less than it really would, he advocated covertly stealing management s authority. If you think a project is interesting, breaks important new ground for the company, or provides valuable training, say so. Management can weigh those factors too. But tricking management into making the wrong decision could literally cost the company hundreds of thousands of dollars. If it costs you your job, you ll have gotten what you deserve.

A TCP/IP network infrastructure plan specifies how you are going to subnet your network and which IP addresses and subnet masks to use Until recently, network administrators were given one or more Class C networks and either subnetted them or didn t Now, with private networks, you can have 17 million IP addresses to play with if you want Instead of nice, safe, understandable Class C networks, you will be allo cated classless interdomain routing (CIDR) oddities like 13116640/19 or 20023414128/25 When your network design is implemented, you switch to your primary function, which is to manage and maintain the network.

and enforce strong passwords using Group Policy. MS-CHAP v2 is supported by computers running Windows Server 2003, Windows 2000, and Windows NT 4.0 with RRAS and Service Pack 4 and later.

Truly excellent programmers learn how to work and play well with others. Writing readable code is part of being a team player. The computer probably reads your program as often as other people do, but it s a lot better at reading poor code than people are. As a readability guideline, keep the person who has to modify your code in mind. Programming is communicating with another programmer first, communicating with the computer second. Most good programmers enjoy making their programs readable, given sufficient time to do so. There are a few holdouts, though, and some of them are good coders.

How will you allocate IP addresses How will you ensure that IP address allocation is implemented for branch offices and remote users Static IP configuration is error-prone, and it is now used mostly only for servers in particular, domain controllers (DCs), infrastructure servers, Routing And Remote Access servers, and BackOffice servers Client PCs that can be configured to receive their addresses automatically are typically configured using the Dynamic Host Configuration Protocol (DHCP) You need to know how to install and authorize a DHCP server; how to set up scopes to configure clients on a single network or on multiple subnets; how to set up DHCP options, and where it is appropriate to use server, scope, or client options; and how to set up a superscope and when it is appropriate to do so.