Networking (1/2)

ISDN (from the ISDN4BSD project)
802.1Q virtual LANs (VLANs)
Hardware-assisted IPv4/TCP/UDP checksums
racoon(8): KAME IKE daemon for IPsec key negotiation (pkgsrc)
Enhanced /etc/ifconfig.xxN syntax
ipfilter now only works on IPsec wire-format packets
Alternate queuing (ALTQ)