The 2520 is better than a 2501.  The 2520 comes with 2 high speed and 2 low speed serial ports so you can also use this router as your frame-relay router.  In addition, it has a built-in RJ-45 style Ethernet port so you don't need a transceiver which saves you money and it also has a built-in ISDN port.  This Cisco dual 2520 router kit was designed to include everything you need to help you to pass your CCNA test such as IPv6. No one else has our copyrighted 224 page CiscoKits Self Study CCNA Lab Workbook(see the lab topics by clicking the link) that will walk you through 60 different labs! Why spend hundreds of dollars on a lab kit if you don't have the labs to accompany your equipment? Other kits don't have console kits, transceivers, back to back cables or the latest software. You will also get our CiscoKits CCNA/CCNP Test Engine with over 500 different questions. Not only that, but you will also get CCNA test tips, the IOS on CD, Cisco's TFTP Server and other prep material. There is also more!  You will also receive our CiscoKits CCNA CRAM Sheet.  This six page, full color, laminated foldout is a great addition to your CCNA Study arsenal.  These routers are in excellent condition and are guaranteed working! The extra information provided on CD is worth $200 by itself. You will be provided with everything you need to hit the ground running to prepare for your test. No need to spend hours looking for tools, procedures, test review material or fumbling around looking for labs. This is a great educational lab kit. Software licensing is the responsibility of the buyer and is provided on the CD only as a backup of what was loaded on the router when we purchased it.
 
  Tested and Guaranteed working!!
  16MB DRAM & 16MB Flash
  Cisco Back to Back Cable
  Four Serial Ports per router
  One Ethernet Port per router
  One Console Port per router
  One AUX Port per router
  Two Power Cables
  Console cable
  Console cable adapter 
  30 Day Warranty!
 
 Additional Items Include:
12.3.24 IOS on CD
 CiscoKits CCENT Test Engine 
 CiscoKits ICND1 & 2 Test Engine 
 CiscoKits CCNA Test Engine 
 CiscoKits BSCI Test Engine 
 CiscoKits BCMSN Test Engine 
 CiscoKits ISCW Test Engine  
 CiscoKits ONT Test Engine
 50+ articles covering Cisco Test concepts 
 TFTP Server 
 Subnet Calculator Trial Tool 
 Port Scanner Trial Tool 
 Password Recovery Trial Tool
 CCNP Pix Firewall & IDS Trial Tools 
 CCNP IOS Configuration Trial Tools
 CCNP Router & Switch Simulator Trial Tools
 CCNP Network Design Trial Tool
 CCNP VOIP Packet Sniffer Trial Tool 
 CiscoKits CCNA Lab Workbook
 CiscoKits CCNA CRAM Sheet