Home » SWITCH 642-813 Q&As » Section 6 - Mix Practice Q&As » 642-813 Q&A – Mix Practice Questions (76-80)

642-813 Q&A – Mix Practice Questions (76-80)

Section 6 – Mix Practice Questions

QUESTION NO: 76
Which three statements about STP timers are true? (Choose three.)
A. STP timers values (hello, forward delay, max age) are included in each BPDU.
B. A switch is not concerned about its local configuration of the STP timers values. It will only consider the value of the STP timers contained in the BPDU it is receiving.
C. To successfully exchange BPDUs between two switches, their STP timers value (hello, forward delay, max age) must be the same.
D. If any STP timer value (hello, forward delay, max age) needs to be changed, it should at least be changed on the root bridge and backup root bridge.
E. On a switched network with a small network diameter, the STP hello timer can be tuned to a lower value to decrease the load on the switch CPU.
F. The root bridge passes the timer information in BPDUs to all routers in the Layer 3 configuration.
Answer: ABD

QUESTION NO: 77
Which three statements are true about DAI? Select three.
A. DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the DHCP Snooping database.
B. DAI forwards all ARP packets received on a trusted interface without any checks.
C. DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the CAM table.
D. DAI forwards all ARP packets received on a trusted interface after verifying and inspecting the packet against the DAI table.
E. DAI intercepts all ARP packets on untrusted ports.
F. DAI is used to prevent against a DHCP Snooping attack.
Answer: ABE

QUESTION NO: 78
To initiate testing, which port does a Cisco IOS IP SLA source use to send a control message to an IP SLA responder?
A. UDP port 2020
B. UDP port 1967
C. TCP port 2020
D. ICMP port 1967
Answer: B

QUESTION NO: 79
Which of the following are true about 802.1Q trunking? (Select one)
A. Both switches must be in the same VTP domain.
B. The encapsulation type of both ends of the trunk does not have to match.
C. The native VLAN on both ends of the trunk must be VLAN 1.
D. 802.1Q trunking can only be configured on a Layer 2 port.
E. In 802.1Q trunking, all VLAN packets are tagged on the trunk link, except the native VLAN.
Answer: E

QUESTION NO: 80
Which of the following conditions guarantees that a broadcast storm cannot occur?
A. a native VLAN mismatch on either side of an 802.1Q link
B. BPDU filter configured on a link to another switch
C. Spanning Tree Protocol enabled on both Layer 2 and multilayer switches
D. PortFast enabled on all access and trunk ports
Answer: C

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