Core links should be the fastest and most reliable leased lines in the WAN
The most common WAN data-link protocols are: 1. HDLC 2. PPP 3. Frame Relay 4. ATM
It is referred to as a point-to-point WAN link, aka a leased line.
why the lan high speed than wan
Data link layer protocols like PPP and HDLC define how data is encapsulated for transmission across a WAN link.
Yes. The link is not displayed for privacy reasons.
Ethernet port
The link below will tell you what you wan to know.
Yes, True
Data Terminal Eqipment (DTE)
The Internet may not be the best example of a WAN, but it is the most known because it is the most visible to users.
The most reliable cheapest and you will find all your needs link to the photo + bonus.
The Parallax Method. See the link for more info.