Load Balancing

Fault Tolerence

Transaction Management

Mulithreaded Architecture

Managability

Security like support for  SSL, Firewall X.509 certificates,Access Control Lists (ACL)

Security Level  i.e. ServerLevel,  Service Level , Directory Level,Object Level etc

Development and Support Tools i.e. Any development Environment.

CORBA Support

Application Portablility for e.g. Application developed in one application server environment can be easily be ported on to other application server environment is possible or not.

EJB Support

External  Data Integeration Support like support  to Integrate with legacy systems via: CICS,IMS,Tuxedo, MQ Series

Distributed Standards Protocols Supported

Platforms Supported like support for Windows , Solaris etc

Protocol Support like CORBA,IIOP,LDAP,JNDI,RMI,HTTP,SMTP,SNMP,NSAPI and ISAPI etc

Database Supported like support for ODBC, JDBC, Oracle, Sybase, MS-Access etc.

Modeling Tool Supported  like support for Rational Rose etc

Connectivity to ERP like SAP, PeopleSoft , BAAN etc

API Support / Properitory Script like PL/SQL cartridge in Oracle WAS, CSPSpider in NetDynamics etc

Third Party WebServer Support like Oracle WAS has it's own Listener still it supports IIS/ NetScape etc.

Third Party Tools Support

Any Other Additional Features of the server like  XML Support , JSP support,