ebgp-multihop vs. disable-connected-check

All, I've read the DocCD on both ebgp-multihop and
disable-connected-check and am failing to see the difference between
the two command in overcoming TTL limitation when forming ebgp peers.
What am I missing?

DocCD Says:

neighbor disable-connected-check:
To disable connection verification to establish an eBGP peering
session with a single-hop peer that uses a loopback interface, use the
neighbor disable-connected-check command in address family or router
configuration mode.

neighbor ebgp-multihop:
To accept and attempt BGP connections to external peers residing on
networks that are not directly connected, use the neighbor
ebgp-multihop command in router configuration mode.

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Received on Mon Aug 09 2010 - 12:05:07 ART