Networks for e-Gov Projects Shatrunjay Rawat IIIT, Hyderabad
Design Steps Requirement Analysis Technology Options Available Constraints Making Design Choice
Requirement Analysis Purpose of the Network Data Only Data and Voice Data, Voice and Video
Requirement Analysis Purpose of the Network On-line application Off-line application Combination of on-line and off-line application Is work scheduling possible?
Requirement Analysis Purpose of the Network Internal Operations Interface with citizens For disseminating information Two way Connecting Multiple Departments/ Institutes Dealer Network
Requirement Analysis Network Availability Fixed Duration Office hours 24 hours
Requirement Analysis User Information Number of Users Concurrency Peak load, average Load User side infrastructure User skills
Requirement Analysis Bandwidth Requirements Known Approximately known Unknown, Open ended Symmetric OR Asymmetric traffic?
Requirement Analysis QoS Requirements Up-time Disaster State Delay, Jitter Call acceptance/rejection rate Can user wait? How long?
Requirement Analysis User Mobility Fixed Mobile within a known boundary Mobile within populated area Absolute mobility – anywhere on earth Or beyond earth!!
Technologies Available Connectivity - LAN Ethernet Frame Relay ATM WiFi L2, L3 Switching
Technologies Available Connectivity - WAN PSTN, ISDN, Wired Broadband Wireless Broadband - WiMax 2G, GPRS, SMS, MMS Fixed Leased Lines MPLS Satellite Communication VSAT, INMARSAT, Iridium
Technologies Available Security Firewall Packet Filtering, Stateful, Application Proxy Hardware, Software IDS, IPS VPN UTM Content Screening Gateways Virus, Spyware, User Data
Technologies Available Security Authentication Open LDAP, Active Directory, etc NAC VLAN Cryptography PKI
Technologies Available Protocols IPv4, IPv6 TCP, UDP Unicast, Multicast IPSec, SSL
Constraints Budget Implementation timelines Organisational capacity Institutional Guidelines Procurement Manual, etc Legal Requirements Taxation System, Equal Opportunity, etc International Treaties – WTO, etc
Few Example Network APSWAN INFINET Sardar Sarovar Automation Stock Exchange Indian Railways Airport Authority of India Load Dispatch System India Post