Você quer:
netsh wlan set profileparameter name="NAME" authentication=WPA2 encryption=TKIP
Se você digitar netsh wlan set profileparameter?, a ajuda que aparecer listará os valores disponíveis para as configurações.
Usage: set profileparameter [name=]<string> [[interface=]<string>]
[SSIDname=<string>] [ConnectionType=ESS|IBSS] [autoSwitch=yes|no]
[ConnectionMode=auto|manual] [nonBroadcast=yes|no]
[authentication=open|shared|WPA|WPA2|WPAPSK|WPA2PSK]
[encryption=none|WEP|TKIP|AES] [keyType=networkKey|passphrase]
[keyIndex=1-4] [keyMaterial=<string>] [PMKCacheMode=yes|no]
[PMKCacheSize=1-255] [PMKCacheTTL=300-86400] [preAuthMode=yes|no]
[preAuthThrottle=1-16 [FIPS=yes|no]
[useOneX=yes|no] [authMode=machineOrUser|machineOnly|userOnly|guest]
[ssoMode=preLogon|postLogon|none] [maxDelay=1-120]
[allowDialog=yes|no] [userVLAN=yes|no]
[heldPeriod=1-3600] [AuthPeriod=1-3600] [StartPeriod=1-3600]
[maxStart=1-100] [maxAuthFailures=1-100] [cacheUserData = yes|no]