I have set up a network as such: Set up host-only networking on VirtualBox. The first adapter is configured with NAT, the second with host-only networking

HOST: Windows GUEST: CentOS VM1, CentOS VM2 (clone of VM1)

When executing ifconfig -a on both VMs, I noticed that the MAC addresses are exactly the same. My question is how am I able to ping from VM1 to VM2 considering that the MAC addresses are the same?

VM1: eth1 Link encap:Ethernet HWaddr 08:00:27:C4:A8:B6
inet addr:192.168.56.102 Bcast:192.168.56.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fec4:a8b6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:130 errors:0 dropped:0 overruns:0 frame:0 TX packets:27 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:18193 (17.7 KiB) TX bytes:4011 (3.9 KiB)

VM2: eth1 Link encap:Ethernet HWaddr 08:00:27:C4:A8:B6
inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fec4:a8b6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1195 errors:0 dropped:0 overruns:0 frame:0 TX packets:39 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:167254 (163.3 KiB) TX bytes:6054 (5.9 KiB)