Frame relay won in the WAN over ATM, which proved too expensive despite its good points, such as five levels of QoS. Now MPLS is pushing aside both. The debate about frame relay vs. ATM as WAN ...

Frame relay had a good run, but the rise of MPLS VPNs has spelled the beginning of the end for the old WAN technology. VPNs burst on the scene in the late 1990s as a way to use the Internet securely ...

A high-speed packet switching protocol used in wide area networks (WANs). Providing a granular service of up to DS3 speed (45 Mbps), it has become popular for LAN to LAN connections across remote ...

今日のテーマは広域イーサネットサービス（以下広域イーサ）である。広域イーサは，デジタル専用線＊1やフレームリレー＊2に代わるWANサービスとして，IP-VPNサービス＊3とともに利用が拡大している。試験でも出題される可能性が高いので，しくみを理解 ...

http://ipexpert.ccieblog.com/ – OSPF is a topic that must be absolutely mastered for the CCIE lab exam. Many students understand the fundamental concepts, but get ...

Many companies are looking for ways to improve data communications while reducing costs. Historically, companies looked to frame-relay networks to provide an inexpensive solution for data ...

Around 1997, I was working with McDonalds Corporate, with their global network architect and we built one of the world’s first Internet data VPN network, McDonalds being at the time operating in over ...