Host reachable via SSH from my desktop but not my laptop

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http://unix.stackexchange.com – I try to use ssh to log in to a remote host. This works for my Ubuntu desktop, however, it fails from my Fedora 14 laptop. The failure means after I type ssh username@host and pressed Enter, nothing else shows on my screen. And using ping on the desktop works fine, however nothing returned on my laptop. It seems that the host is not reachable from my laptop. Both machines are in the same network environment (they share the same home router), except the desktop uses wired connection while the laptop uses wireless. Besides the host files on both machines have no entry for the host name I w (HowTos)