The 100-101 Interconnecting Cisco Networking Devices Part 1 (ICND1) is the exam associated with the CCENT certification and a tangible first step in achieving the CCNA Routing and Switching certification. 

Candidates can prepare for this exam by taking the Interconnecting Cisco Networking Devices Part 1 (ICND1) course. 

This exam tests a candidate's knowledge and skills required to successfully install, operate, and troubleshoot a small branch office network. 

The exam includes topics on the Operation of IP Data Networks; LAN Switching Technologies; IP Addressing (IPv4 & IPv6); IP Routing Technologies; IP Services (DHCP, NAT, ACLs); Network Device Security; Basic Troubleshooting.