سؤال Switch0 and Switch1

السلام عليكم و رحمة الله و بركاته

لي سؤال :

ما معنى:

Switch0 and Switch1 - هنا:

الله يوفقكم جميع ويجزيكم كل خير

Router# show ip interface brief

Interface IP-Address OK? Method Status Protocol

GigabitEthernet1/1 unassigned YES NVRAM administratively down down

GigabitEthernet1/0 unassigned YES NVRAM administratively down down

Switch0 unassigned YES unset up up

Switch1 unassigned YES NVRAM up up

FastEthernet2/0 unassigned YES NVRAM administratively down down

FastEthernet2/1 unassigned YES NVRAM administratively down down