c:> telnet ***.***.***.*** username : admin password : **** <hub> system-view [hub] display mac-address MAC ADDR VLAN ID STATE PORT INDEX AGING TIME(s) 1111-1111-1111 1 Learned GigabitEthernet1/0/11 AGING 2222-3333-2222 1 Learned GigabitEthernet1/0/5 AGING 3333-3333-3333 1 Learned GigabitEthernet1/0/11 AGING ... 4444-4444-4444 1 Learned GigabitEthernet1/0/11 AGING <= 차단해야할..