SELECTING THE RIGHT BANDWIDTH

My company’s network currently has 128K connection to our ISP/Internet.

WHAT IS THE LEAST BANDWIDTH I CAN PROVIDE
My traffic readings are as follows

Outgoing Services count &age
80/www Internet Browsing 4,680 44.50%
443/httpsSecure Browsing 2,633 25.04%
102/iso-tsap Mail transfer 1,921 18.27%
139/netbios-ssn Windows NT 992 9.43%
21/ftp File Download 130 1.24%
Others Others 160 1.52%

Incoming Services
Port Service count %age
25/smtp Mail Inbound 10,272 38.50%
80/www Net Browsing 6,614 24.79%
110/pop3 Mail Retrieve 5,242 19.65%
102/iso-tsa Mail transfer 1,733 6.50%
135/ Windows NT 1,441 5.40%
Others Others 1,378 5.16%