CCNP R&S Practice Exam 3 – MCQsGoogle ADs How is a bridging loop best described? The round-trip path a frame takes from source to destination. A loop formed between switches for redundancy. A loop formed between switches where frames circulate endlessly. A loop formed by the Spanning Tree Protocol.What happens if the root bridge switch and another switch are configured with different STP Hello timer values? Nothing—each sends hellos at different times. A bridging loop could form because the two switches are out of sync. The switch with the lower Hello timer becomes the root bridge. The other switch changes its Hello timer to match the root bridgeWhich of the following commands is most likely to make a switch become the root bridge for VLAN 5, assuming that all switches have the default STP parameters? spanning-tree root spanning-tree root vlan 5 spanning-tree vlan 5 priority 100 spanning-tree vlan 5 rootWhat is the default path cost of a Gigabit Ethernet switch port? 1 2 4 19 1000Which one of the following VTP modes does not allow any manual VLAN configuration changes? Server Client Designated TransparentWhich of these parameters should you change to make a switch become a root bridge? Port priority Bridge priority Path cost Switch MAC addressWhich of the following is a result of a poorly placed root bridge in a network? Root bridge election flapping occurs. STP topology can take unexpected paths. STP topology can’t be resolved. Bridging loops form.Which IOS command configures a Catalyst switch for VTP client mode? vtp client vtp mode client set vtp mode client- vtp client modeTo maintain a loop-free STP topology, which one of the following should a switch uplink be protected against? BPDUs relayed from the root bridge A sudden loss of BPDUs Too many BPDUs The wrong version of BPDUsWhy is it important to protect the placement of the root bridge? So the root bridge can have complete knowledge of the STP topology. So all hosts have the correct gateway. To keep two root bridges from becoming active. To keep the STP topology stable.What is the purpose of VTP pruning? Limit the size of the virtual tree Limit the extent of broadcast traffic Limit the number of VLANs in a domain Stop unnecessary VTP advertisements-Which VLAN number is never eligible for VTP pruning? 0 1 1000 1001Which one of the following is a valid VTP advertisement? Triggered update Subset VLAN database DomainWhat command can change the path cost of interface Gigabit Ethernet 3/1 to a value of 8? spanning-tree path-cost 8 spanning-tree cost 8 spanning-tree port-cost 8 spanning-tree gig 3/1 cost 8Where does a collision domain exist in a switched network? On a single VLAN Across all VLANs On a single switch port Across all switch portsWhich one of the following commands can be used to verify the current root bridge in VLAN 10? show root vlan 10 show root-bridge vlan 10 show spanning-tree vlan 10 root show running-configWhich of the following is not a Catalyst switch VTP mode? Transparent Designated Client ServerIf used, the STP BackboneFast feature should be enabled on which of these? All backbone- or core-layer switches All backbone- and distribution-layer switches All access-layer switches- All switches in the networkWhich of the following might present a VTP problem? Two or more VTP servers in a domain Two servers with the same configuration revision number A server in two domains A new server with a higher configuration revision numberWhere should the root bridge be placed on a network? Closest to the most users On the fastest switch Closest to the center of the network On the least-used switchA switch in VTP transparent mode can do which one of the following? Create a new VLAN Only listen to VTP advertisements Send its own VTP advertisements Cannot make VLAN configuration changesWhich one of the following is needed for VTP communication? A Management VLAN An Access VLAN A Trunk link – An IP addressHow many instances of STP are supported in the Cisco implementation of MST? 1 16 256 4096What network diameter value is the basis for the default STP timer calculations? 1 3 7 9 15Where should the STP PortFast feature be used? An access-layer switch port connected to a PC An access-layer switch port connected to a hub A distribution-layer switch port connected to an access layer switch A core-layer switch portWhere should the STP UplinkFast feature be enabled? A distribution-layer switch. An access-layer switch. A core-layer switch. All these answers are correct.What is the default 802.1D STP bridge priority on a Catalyst switch? 0 1 32,768 65,535Select all the parameters that decide whether to accept new VTP information: VTP priority VTP domain name Configuration revision number VTP server nameHow many VTP management domains can a Catalyst switch participate in? 1 2 Unlimited 4096If a VTP server is configured for VTP version 2, what else must happen for successful VTP communication in a domain? A VTP version 2 password must be set. All other switches in the domain must be version 2 capable. All other switches must be configured for VTP version 2. The VTP configuration revision number must be reset. 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