Which two Cisco Catalyst switch interface commands allow only a single voice device and a single
data device to be connected to the IEEE 802.1X-enabled interface? (Choose two.)
A.
authentication host-mode single-host
B.
authentication host-mode multi-domain
C.
authentication host-mode multi-host
D.
authentication host-mode multi-auth
Explanation:
But why? The command authentication host-mode single-host allows one and only one device to be authenticated, and never more than one device. The only correct answer is B. I don’t know why this question should have two answers, because the word “only” in the question prevents answer C and D to be correct.
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/sw8021x.html
802.1x Host Mode
You can configure an 802.1x port for single-host or for multiple-hosts mode. In single-host mode (see Figure 1-1), only one client can be connected to the 802.1x-enabled switch port. The switch detects the client by sending an EAPOL frame when the port link state changes to the up state. If a client leaves or is replaced with another client, the switch changes the port link state to down, and the port returns to the unauthorized state.
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Best Regards!
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