As you asking for the syllabus of the IBPS Specialist Officer Exam IT that Syllabus containing the topics of the Computer Fundamental / BITS is given below :

Impact of IT on Banking :
Changing Financial Environment and IT as a Strategic Response

System Software: operating Systems(Windows/Unix/Linux)

Computer Languages: C, C++, C# and JAVA etc

Database Management System and Relational Database Management Systems

Computer Networks : Network Layers, Topologies, Protocols, IP Address Mechanisms, LAN,WAN, VLAN, Intranet, Extranet, Internet

Network Equipments : Cables (Twisted Pair, Fiber Optics), Connectors, I/Os, Patch Panel, JackPanels, Network RacksNetwork / Security Equipments: Modems, Hubs, Switches, Bridges, Routers, Firewalls, NIDS,HIDS, IPS

System Architecture :
Clients (Hardware / Software), Servers (Hardware / Software). Client
Server Architecture,3 Tier Architecture, N-Tier Architecture etc

Centralized Banking System / Core Banking System / System Administration, DatabaseAdministration, Application Server and Application Administration, Network Administration,Domains, ISPS, Hosting, Data Downloads / Uploads, Band widths, Data Centre, Data Storage

Devices, Data Backups / Restoration, Disaster Recovery Centre

Threats to Information System :
i) Physical (Insiders / outsiders)
ii) Viruses, Worms, Trojan
horse, Malwares, Software bombs, Phishing, Spoofing, Spamming, denial of service attacks etc.