what is the meaning of this question and what's the possible best answer: ============================ Q- Why is router on a stick a necessary solution?
1-because Layer 2 LAN switches can also operate at Layer 3 2-because routers cannot route packets between multiple VLANs 3-because Layer 2 LAN switches can only support a single VLAN 4-because Layer 2 LAN switches cannot switch frames between multiple VLANs ============================================
google this group for "router on a stick"
That's obviously wrong so you can eliminate that.
That's true on some routers but not all routers.
That's true on some layer 2 switches but not all layer 2 switches.
There are some unusual switches and unusual definitions of VLANs; that one would probably be good for some beer arguments with some old timers.
What is the basic function that a router performs ?
With the answer for that question you can divine the answer to your posted question
#4.
Looks like one of the questions in the CCNA intro book.
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