AHH..I opened my tcpview only to find out that there are 17 or so svchost.exe running?

Heres a snip-it i edited it for obvious reasons!:::::::::::::

svchost.exe:1024 UDP myputer:1037 *:*
svchost.exe:1024 UDP myputer:1042 *:*
svchost.exe:1024 UDP myputer:1054 *:*
svchost.exe:1024 UDP myputer:4921 *:*
svchost.exe:1052 TCP myputer:5000 myputer:0 LISTENING
svchost.exe:1052 UDP myputer:1900 *:*
svchost.exe:1052 UDP myputer:1900 *:*
svchost.exe:916 TCP myputer:epmap myputer:0 LISTENING
svchost.exe:960 TCP myputer:1025 myputer:0 LISTENING
svchost.exe:960 TCP myputer:netbios-ssn myputer:0 LISTENING
svchost.exe:960 UDP myputer:ntp *:*
svchost.exe:960 UDP myputer:netbios-ns *:*
svchost.exe:960 UDP myputer:netbios-dgm *:*
svchost.exe:960 UDP myputer:ntp *:*
Now, is this normal? Cause before I noticed only two at the most! This is my very basic computer set up:

WinXP pro
Nortan Internet Security
If you need more info tell me! Thanx