An industry-standard Internet tunneling protocol that provides
encapsulation for sending Point-to-Point Protocol (PPP) frames
across packet-oriented media.
layered
service provider (LSP)
A service that provides higher-level custom communication
functions and relies on services provided by an underlying base
provider. In ISA Server, the Firewall Client software is a layered
service provider that extends Winsock 2 from the client to the
ISA Server computer and uses the underlying base TCP/IP service
provider to communicate with the ISA Server computer.
load balancing
A method to distribute client requests among ISA Server
computers. If one ISA Server computer is unavailable, another
server can accept the request, preventing an interruption in
service.
local address
table (LAT)
A table of all the IP address ranges on the ISA Server network
in which a Firewall client resides. If Firewall client support is
enabled for a specific network, all the IP address ranges included
in that network are distributed to Firewall clients and stored
locally. Firewall clients recognize IP addresses that are included
in the IP address ranges in the LAT as local destinations that can
be contacted directly. The LAT is updated periodically by ISA
Server.