During a penetration test, you are required to capture and analyze traffic on a client's network to identify unencrypted protocols transmitting sensitive information. The client's network consists of switched Ethernet. What approach could you take to effectively sniff network packets considering the network configuration?
ARP poisoning
Enabling promiscuous mode on a network adapter
Using Switched Port Analyzer (SPAN) to mirror traffic
Creating a rogue DHCP server
Broadcasting ICMP echo requests
Subnetting the network to isolate traffic