Data Connectivity Components -

bridge the wireless and wired worlds. They convert 802.11 (Wi-Fi) frames to 802.3 (Ethernet) frames and vice versa. A WAP is essentially a switch port with a radio transceiver, managing multiple client connections, handling authentication, and negotiating data rates based on signal strength and noise.

create encrypted tunnels across untrusted networks (like the internet). A VPN client encapsulates and encrypts the entire IP packet, then adds a new outer header addressed to a VPN server. This provides confidentiality (encryption), data integrity (hashing), and authentication. Modern implementations often use IPsec (Internet Protocol Security) or TLS (Transport Layer Security). data connectivity components

A platform-independent industry standard for Java applications. It provides standard methods to query and update data in a relational database. bridge the wireless and wired worlds

These are software libraries that allow a specific application to communicate with a specific database or data source. create encrypted tunnels across untrusted networks (like the

include Simple Network Management Protocol (SNMP), which allows administrators to monitor devices (routers, switches, servers) for performance metrics, errors, and configuration changes. Network analyzers (e.g., Wireshark) capture and dissect raw packets for troubleshooting. Software-Defined Networking (SDN) is an emerging paradigm that decouples the control plane (deciding where packets go) from the data plane (forwarding packets), enabling programmable, centralized network management.

operate at the network layer (Layer 3 of the OSI model). Unlike switches, which connect devices within the same network, routers interconnect different networks—such as a home LAN to the internet. They use IP addresses and routing tables to determine the optimal path for packets across potentially dozens of intermediate networks. Routers are the core of the internet; every packet crossing from one autonomous system to another passes through a router.