There is some value to the CCNA, but if you end up working in a shop that uses HP, or Dell, or any other brand of networking equipment then much of the material isn't as relevant. Unless you're going into a role where you will be doing routing and switching or firewall activity most of the time you would probably be better served getting a Network+ cert instead of a CCNA. It's much more general, but it's also much more applicable to what someone in a server admin role needs to know than a CCNA is.
If you're working in a server role (MCSA/MCSE or MCITP Server Admiin/Enterprise Admin) the A+ is pretty remedial. Server+ is more relevant.
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CompTIA A+, Network+, Server+, Security+
MCTS:Windows 7
MCTS:Hyper-V
MCTS:System Center Virtual Machine Manager
MCSE:Security 2003
MCITP:Enterprise Administrator