Which two mechanisms does Cisco EnergyWise use for neighbor discovery? (Choose two.)
A.
multicast
B.
LLDP-MED
C.
UDP broadcast
D.
Cisco Discovery Protocol
E.
TCP
Explanation:
Cisco EnergyWise Neighbor Discovery Process
The Cisco EnergyWise neighbor discovery process is the mechanism by which domain members
discover each other and populate their Cisco EnergyWise neighbor tables. Cisco EnergyWise queries
can subsequently be distributed to all domain members using the neighbor relationships to monitorand control the power usage of devices within a domain. Cisco EnergyWise domain members
automatically discover their neighbors through one of two mechanisms:
Cisco EnergyWise UDP broadcast packet
Cisco EnergyWise CDP packets
UDP broadcast packets are automatically sent out switch ports which support Cisco EnergyWise,
regardless of whether the interfaces are configured with the no energywise interface-level
command. CDP packets are sent when CDP is configured for the switch ports.http://www.cisco.com/en/US/docs/solutions/Enterprise/Borderless_Networks/Energy_Managemen
t/energywisedg.htHYPERLINK
“http://www.cisco.com/en/US/docs/solutions/Enterprise/Borderless_Networks/Energy_Manageme
nt/energywisedg.html?referring_site=smartnavRD#_blank”mHYPERLINK
“http://www.cisco.com/en/US/docs/solutions/Enterprise/Borderless_Networks/Energy_Manageme
nt/energywisedg.html?referring_site=smartnavRD#_blank”l?referring_site=smartnavRD#wp555927
2017 Aug New Updated 400-351 exam questions:
QUESTION 263
legacy 802.11b wireless scanners are begin implemented in your autonomous AP deployment Existing modern clients work fine on the same SSIDs, APs, and channel the legacy scanner are having difficulty maintaining reliable wireless connectivity which AP configured could potential correct this issue
A. Enable short preamble Dot11Radio0
B. Disable short preamble Dot11radio1
C. Disable short preamble dot 11 radio0
D. Confirm that 802.11n support is disable
E. Conf1gure globalpreamble negotiation
F. Enable short preamble on Dot 11Radio1
Answer: C
QUESTION 264
You are deploying a high-density wireless setup in a conference center using Cisco Aironet 3700iAPs as you have no Cisco air not 3700e APs available. The power levels for all the APs should be set between 4 and 5 which configuration option is needed to achieve this goal.?
A. Select the TPaC values between 4 dBm and q dBm
B. Manually configure the power levels of the 802.11b and 80211a radios of all APs either 4 or 5
C. Select the tcp values between 4 dBm and dBm
D. Select the TPC values between 11 dNm and 8 dBm
Answer: B
QUESTION 265
While configuring Wireless Domain Services, which port is used for traffic between infrastructure APs and the WDS AP?
A. Generic Routing Encapsulation GRE which is IP protocol 47
B. UDP destination and source protocol Port 1812 (0x0714)
C. UDP destination and source protocol port 2887 (0x0B47) or Ethernet Type 34605 (0x872D)
D. UDP destination and Source Protocol Port 1645 (0x066D)
Answer: C
QUESTION 266
Assuming that the antenna system characteristics (for example, gain VSWR, polarization and beam width) are similar for a 5-GHz and 2.4-GHz radio. While conducting a dual band site survey, how to configure the 5-GHz radio, relative to the 2.4-GHz radio, in order to achieve similar cell size?
A. The 5-GHz radio power level should be higher than the 2.4-GHz radio
B. The 5-GHz radio should use BPSK modulation and the 2.4 GHz radio should use CCK modulation
C. The 5-GHz radio power level should be lower than the 2.4-GHz radio
D. The 5-GHz radio should use CCK modulation and the 2.4-GHz radio should use BPSK modulation
Answer: A
QUESTION 267
For the following cipher suites, which were defined in the IEEE 802.11i-2004 standard and then again in the 802.11-2007 standard? Select all that apply.
A. TKIP
B. WEP-40
C. TCP-IP
D. WEP-104
E. AES-CCMP
Answer: ABDE
QUESTION 268
Which two actions will happen when a wireless client deploys a Layer 2 roam between two WLCs with management IP addresses on different IP subnets but dynamic interfaces in the same VLAN? (Choose two.)
A. The new WLC exchanges mobility messages with the original WLC and the client database entry is moved to the new WLC.
B. The original WLC marks the client with an “Anchor” entry in its own client database.
C. The client database entry is maintained on both the original and newWLCs.
D. The client database entry is removed from the original WLC once it has been entered into the new WLC.
Answer: AD
QUESTION 269
How to monitor CPU utilization on a wireless LAN Controller?
A. Define the network management system and community in the WLC and a matching v1 or v2 community-string in the network management system to enable the WLC CPU OID to be polled
B. Define the network management system as a trap receiver and enable the default RFC 1213 traps, which include SysCPUUtilization
C. Define the network management system in the WLC with a matching read-write SNMP community to enable the WLC CPU OID to be polled with an SNMP set by the network management system
D. Define an external syslog receiver in the WLC that will receive a syslog message when the percentage of CPU processing ability reaches a preconfigured percentage
Answer: A
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