IBM Certification Exams

Five things to know about Cisco’s CCNA ICND Exam:
1. CCNA ICND is comprehensive
The Cisco CCNA ICND exam covers a large variety of topics from basic TCP/IP knowledge to routing protocols and spanning trees. In other words, it’s a tough exam because it covers so much. It is important that you do well on the ICND [...]

Why? Since ISDN is basically a phone call from one router to another, you’re getting billed for that phone call — by the minute. If one of your routers dials another, and never hangs up, the connection can theoretically last for days or weeks. The network manager then receives an astronomical phone bill, which leads [...]