【多选题】The original commercial version of Ethernet supported 10 Mbps bandwidth; the version introduced in the early 1990s supports 100 Mbps; and in 1998, Gigabit Ethernet was introduced. All versions use the...
A.
Ethernet works at the Data Link and Physical layers of the OSI model, and upgrades to newer, faster versions of Ethernet can be made by changing only the components that work at these layers.
B.
Ethernet spans several layers and requires a new protocol stack to upgrade to new versions.
C.
Changes in technology at one layer of the OSI model don’t usually affect the operation of other layers.
【多选题】Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information? ()
A.
the amount of available ROM
B.
the amount of available flash and RAM memory
C.
the version of the bootstrap software present on the router