If you're following a Cisco CCNA track then don't bother with the Network+ cert... it covers many of the same topics as the CCNA.
Nowadays the networking field encompasses WAN, LAN, SAN, security, some elements of software development, Web servers, and even some System Administration. This is a great change from the days when I first got into networking... back then it was pretty much WAN and LAN only. I look at Cisco IOS today (the real IOS
) and it looks much different than it did when I laid my hands on my first Cisco AGS+ router.
Compared to modern Cisco gear these beasts are now true museum pieces!