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28.16. IPv6 Control Protocol
This Protocol is used for establishing and configuring IPv6 over PPP.
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28.17. Layer 2 Tunneling Protocol
Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol
(PPTP) used by an Internet service provider (ISP) to enable the operation of a virtual private
network (VPN) over the Internet.
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28.18. Link Quality Report
The Link Quality Report (LQR) protocol is a part of the Point-to-Point Protocol (PPP), which allows
two computers to connect to each other. LQR allows peers at either end of the PPP link to assess
the state and quality of the PPP link.
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28.19. Mobile IP
Mobile IP is an IETF standard communications protocol that is designed to allow mobile device
users to move from one network to another while maintaining a permanent IP address.
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dns
udp
2
4
Tunnels
Masquerading Tunnels
Tunneling
ppp
17
4
Tunnels
Tunneling
ip
udp
18
5
Tunnels
Tunneling
ppp
18
5
Tunnels
Tunneling
udp
12
3
325
Chapter 28: Tunneling