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SampleQuestions Question #1: Refer to theexhibit. The output that is shown is generated at a switch. Which three statements are true? (Choosethree.) All ports will be in a state of discarding, learning, orforwarding. Thirty VLANs have been configured on thisswitch. The bridge priority is lower than the default value for spanningtree. All interfaces that are shown are on sharedmedia. All designated ports are in a forwardingstate. This switch must be the root bridge for all VLANs on thisswitch. Answer:A,C,E Question #2: Which three statements about RSTP are true? (Choosethree.) RSTP significantly reduces topology reconverging time after a linkfailure. RSTP expands the STP port roles by adding the alternate and backup roles.
RSTP port states are blocking, discarding, learning, orforwarding. RSTP provides a faster transition to the forwarding state on point-to-point links than STPdoes. RSTP also uses the STP proposal-agreementsequence. RSTP uses the same timer-based process as STP on point-to-pointlinks. Answer: A, B,D Question #3: At which layer of the OSI model is RSTP used to preventloops? Physical Datalink Network Transport Answer: B Question #4: What does a Layer 2 switch use to decide where to forward a receivedframe? Source MACaddress Source IPaddress Source switchport Destination IPaddress Destination portaddress Destination MACaddress Answer:F
Question #5: Which two benefits are provided by creating VLANs? (Choosetwo.) Addedsecurity Dedicatedbandwidth Providessegmentation Allows switches to route traffic between subinterfaces Containscollisions Answer: A, C Question #6: Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the sameLAN? Pingaddress Tracertaddress Tracerouteaddress Arpaddress Answer: A Question #7: Which two of these are characteristics of the 802.1Q protocol? (Choosetwo.) It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topologychanges. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed. It is a Layer 2 messaging protocol which maintains VLAN configurations acrossnetworks. It includes an 8-bit field which specifies the priority of aframe. It is a trunking protocol capable of carrying untaggedframes. Answer: B,E
Question #8: What is one benefit ofPVST+? PVST+ supports Layer 3 load balancing withoutloops. PVST+ reduces the CPU cycles for all the switches in thenetwork. PVST+ allows the root switch location to be optimized perVLAN. PVST+ automatically selects the root bridge location, to provide optimized bandwidthusage. Answer: C Question #9: Which are valid modes for a switch port used as a VLAN trunk? (Choosethree.) Transparent Auto On Desirable Blocking Forwarding Answer: B, C,D Question #10: Which three of these statements regarding 802.1Q trunking are correct? (Choose three.) 802.1Q native VLAN frames are untagged bydefault. 802.1Q trunking ports can also be secureports. 802.1Q trunks can use 10 Mb/s Ethernetinterfaces. 802.1Q trunks require full-duplex, point-to-pointconnectivity. 802.1Q trunks should have native VLANs that are the same at bothends. Answer: A, C,E
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