Cisco IOS Naming

In Cisco IOS names every character has a meaning.

IOS SOFTWARE :

y :ip
7 :adsl
s :plus

o :firewall
v :voice
k9 :IPSEC 3 DES , encryption > 64 bit
k8 :IPSEC 56 , encryption <64 bit
3 :IDS
n :IPX
br2 :AT / IBM
a :APPN
j :ENTERPRISE
a3 :SNA SOFTWARE



c1700-y-mz12.2-2.T1 :IP
c1700-y7-mz :IP / ADSL
c1700-sy7-mz :IP / ADSL plus
c1700-k9sy7-mz :IP / ADSL PLUS 3 DES
c1700-k8sy7-mz :IP / ADSL PLUS IPSEC 56
c1700-k9o3sy7-mz :IP / ADSL / FW / IDS PLUS IPSEC 3 DES
c1700-k8o3sy7-mz :IP / ADSL / FW / IDS PLUS IPSEC 56
c1700-bnr2sy7-mz :IP / ADSL / IPX / AT / IBM PLUS
c1700-no3sy7-mz :IP / ADSL / IPX / FW / IDS PLUS
c1700-bk9no3r2sv3y7-mz :IP / ADSL / IPX/AT/IBM/VOICE/FW/IDS PLUS IPSEC 3 DES
c3640-ajs-mz.120.22 :ENTERPRISE / APPN PLUS
c3640-js-mz.122-10a.bin :ENTERPRISE PLUS
c3640-ainr-mz.112-26.P4.bin :IP / IPX / IBM / APPN
c3640-a3js-mz.122-10a.bin :ENTERPRISE / SNASOFTWARE PLUS



Example of a Cisco IOS Image Name