EnsurepassQUESTION 121 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database?   A. Dynamic ARP Inspection B. storm control C. VTP pruning D. DHCP snooping Correct Answer: A Explanation: Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database, the DHCP snooping binding database. This database is built by DHCP snooping if DHCP snooping is enabled Read more [...]
EnsurepassQUESTION 131 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. Which configuration must be made before the private VLAN is configured?   A. Disable VTP and manually assign VLANs. B. Ensure all switches are configured as VTP server mode. C. Configure VTP Transparent Mode. D. Enable VTP version 3.   Correct Answer: C Explanation: You must configure VTP to transparent mode before you can create a private VLAN. Private VLANs Read more [...]
EnsurepassQUESTION 111 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server?   A. ip dhcp snooping trust B. ip dhcp snooping C. ip dhcp trust D. ip dhcp snooping information   Correct Answer: A Explanation: When configuring DHCP snooping, follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN, and enable DHCP globally on the switch. Before globally enabling DHCP snooping on the switch, Read more [...]
EnsurepassQUESTION 101 An administrator recently configured all ports for rapid transition using PortFast.After testing, it has been determined that several ports are not transitioning as they should. What is the reason for this?   A. RSTP has been enabled per interface and not globally. B. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. C. STP is unable to achieve rapid transition for trunk links. D. The switch does not have the processing Read more [...]
EnsurepassQUESTION 81 The network manager has requested that several new VLANs (VLAN 10, 20, and 30) are allowed to traverse the switch trunk interface. After the command switchport trunk allowed vlan 10,20,30 is issued, all other existing VLANs no longer pass traffic over the trunk. What is the root cause of the problem?   A. The command effectively removed all other working VLANs and replaced them with the new VLANs. B. VTP pruning removed all unused VLANs. C. ISL was unable to Read more [...]
EnsurepassQUESTION 91 Which technique allows specific VLANs to be strictly permitted by the administrator?   A. VTP pruning B. transparent bridging C. trunkallowed VLANs D. VLAN access-list E. L2P tunneling   Correct Answer: C Explanation: By default, a trunk port sends traffic to and receives traffic from all VLANs. All VLAN IDs, 1 to 4094, are allowed on each trunk. However, you can remove VLANs from the allowed list, preventing traffic from those VLANs from passing over Read more [...]
EnsurepassQUESTION 61 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. This command is configured globally:   monitor session 2 filter vlan 1 - 8, 39, 52   What is the result of the implemented command?   A. All VLAN traffic is sent to the SPAN destination interface. B. Traffic from VLAN 4 is not sent to the SPAN destination interface. C. Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. D. The trunk's Read more [...]
EnsurepassQUESTION 71 Which statement about restrictions for multichassis LACP is true?   A. It is available only on a Cisco Catalyst 6500 Series chassis. B. It does not support 1Gb links. C. Converting a port channel to mLACP can cause a service disruption. D. It is not available in VSS.   Correct Answer: C Explanation: When configuring mLACP for Server Access, follow these guidelines and restrictions: PFC3A mode does not support the mLACP for server access feature. VSS mode Read more [...]
EnsurepassQUESTION 51 Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true?   A. CDP is enabled by default and can be disabled globally with the command no cdp run. B. CDP is disabled by default and can be enabled globally with the command cdp enable. C. CDP is enabled by default and can be disabled globally with the command no cdp enable. D. CDP is disabled by default and can be enabled globally with the command cdp run.   Correct Answer: Read more [...]
EnsurepassQUESTION 31 Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain, password, and version. However, VLANs are not passing from the VTP server (existing network) to the VTP clients. What must be done to fix this?   A. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name. B. Configure a different native VLAN on all new switches that are Read more [...]
EnsurepassQUESTION 41 After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the down/down state. Switch A is configured with channel-group 1 mode active, while Switch B is configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?   A. The switches are using mismatched EtherChannel negotiation modes. B. The switch ports are not configured in trunking mode. C. LACP priority must be configured on both switches. Read more [...]
EnsurepassQUESTION 21 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port, whenis a syslog message generated?   A. A MAC address or host moves between different switch ports. B. A new MAC address is added to the content-addressable memory. C. A new MAC address is removed from the content-addressable memory. D. More than 64 MAC addresses are added to the content-addressable memory.   Correct Answer: A Explanation: mac-address-table Read more [...]
EnsurepassQUESTION 11 What is the maximum number of switches that can be stacked using Cisco StackWise?   A. 4 B. 5 C. 8 D. 9 E. 10 F. 13   Correct Answer: D Explanation: Up to 9 Cisco Catalyst switches can be stacked together to build single logical StackWise switch since Cisco IOS XE Release 3.3.0SE. Prior to Cisco IOS XE Release3.3.0SE, up to 4 Cisco Catalyst switches could be stacked together. Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series- Read more [...]
EnsurepassQUESTION 1 What is the size of the VLAN field inside an 802.1q frame?   A. 8-bit B. 12-bit C. 16-bit D. 32-bit   Correct Answer: B Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs. The hexadecimal values of 0x000 and 0xFFF are reserved. All other values may be used as VLAN identifiers, allowing up to 4,094 VLANs Reference: http://en.wikipedia.org/wiki/IEEE_802.1Q     QUESTION 2 A manager tells the network engineer Read more [...]