單項選擇題Which protocol is used by multicast to prevent loops?（）

A.OSPF
B.RIP
C.RPF
D.BGP
E.EIGRP


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題How do Cisco Unified Communications IP phones receive firmware upgrades?（）

A.user request using the keypad of the phone and HTTP download
B.IT department scheduled upgrade using HTTP download
C.TFTP download based on version control through Cisco Unified Communications Manager
D.FTP download based on version control through Cisco Unified Communications Manager
E.HTTP download based on version control through Cisco Unified Communications Manager

3.多項選擇題Which three are interframe spaces defined in 802.11?（）

A.SIFS
B.PIFS
C.DIFS
D.LIFS
E.NAV
F.CWmin

4.單項選擇題Which statement describes the call behavior of the Cisco Unified Wireless IP Phone 7921G when it roams from 802.11b to 802.11a?（）

A.The phone does a directed call hangup on 802.11b，then does an auto-redial on 802.11a，creating a  new call.
B.The phone does a directed call hangup on 802.11b， then the user does a redial on 802.11a，creating a  new call.
C.The phone does a disassociation on 802.11b and an association on 802.11a，and call remains up if the  subnet has not changed.
D.The phone does not roam from 802.11b to 802.11a when on an active call.
E.The phone must switch network profiles to roam from 802.11b to 802.11a.

5.單項選擇題What call performance statistics are reported on the Cisco Wireless IP Phone 7921 user interface?（）

A.minimum jitter
B.maximum jitter
C.upstream standard packet deviation
D.average MOS value
E.average conceal rate

9.多項選擇題Which three are benefits of U-APSD?（）

A.synchronization of the transmission and reception of voice frames
B.bandwidth reservation
C.optimized power-save mode periods
D.increased call capacity
E.priority bandwidth and polling

10.多項選擇題Which three solutions does AirMagnet VoFi Pro Analyzer integrate?（）

A.Cisco Unified Communications Manager
B.Cisco Spectrum Expert
C.Vocera Server to display the username of the Vocera badge
D.Polycom SpectraLink syslog server
E.Cisco WCS VoWLAN readiness tool