Network Implementation (20%)

N10-009 · 60 questions

• After a new access switch is added, traffic between two floors starts taking a long path through that closet. All switches still use the default bridge priority, and the new switch has the lowest MAC address. Which change puts the core switch back in charge of the topology?
• A warehouse is placing three 2.4 GHz access points along one aisle, and each radio will use a 20 MHz channel. Which channel set keeps those three radios from overlapping one another?
• A retail closet goes dark the instant utility power drops, even though the rack's metered power strip still has spare outlets and contains no batteries. Which device is missing if the switches must stay up long enough to shut down cleanly?
• A library router holds an OSPF route for 10.40.0.0/16 and a static route for 10.40.8.0/24 toward the branch firewall. Which route forwards a packet destined for 10.40.8.20?
• A retail shop has one public IPv4 address, and dozens of laptops browse at the same time. The firewall rewrites each private source address to that public address and tracks a different source port for every session. Which translation is this?
• Two access switches trunk several VLANs, but devices on the untagged VLAN can reach the wrong subnet whenever traffic crosses the trunk. Tagged VLANs on the same trunk behave normally. Which trunk setting is mismatched?
• A stub branch office has one router and one path to headquarters. The staff do not want a routing protocol running on that single link. Which design fits the office?
• Two distribution switches have two parallel cables between them. The designer wants both cables forwarding and wants traffic to survive if one cable is unplugged. Which feature should be configured on the pair?
• Hosts on a factory LAN use 10.8.8.1 as their gateway. That address is not a physical interface on either router. When router A is powered off, router B starts answering for 10.8.8.1 and the hosts keep working. Which feature is this?
• A school keeps the service entrance, the core router, and the main patch field in the basement. Each floor has a smaller locked closet that patches only that floor back to the basement. What is the floor closet?
• Five access points in a warehouse advertise one network name so phones can roam the aisles. Each radio still has its own MAC address. Which identifier stays the same as a phone walks, and which one changes?
• A small office has no RADIUS server and wants wireless encryption whose personal-mode handshake replaces the older shared-passphrase handshake. Which security mode fits?
• Servers in a data hall send jumbo frames, while a switch in the middle of the path still allows only the standard 1500-byte payload. Large copies fail, and 200-byte pings succeed. Which change fixes the copies?
• A long narrow warehouse aisle needs the radio energy aimed along the aisle rather than sprayed into a nearby office. Which choice fits that coverage goal?
• A PDU meter on a data-center rack shows the circuit already near its rated load, and a project wants to add a chassis to that rack. What is the correct conclusion?
• A winter closet at city hall is so dry that technicians get static shocks whenever they touch a switch. Which condition explains the shocks?
• A university needs a dynamic routing protocol that floods link-state advertisements and computes a shortest-path tree. Which protocol does that?
• A branch-office phone and a PC share one wall jack. The phone's frames are tagged into the voice network, and the PC stays untagged on the data network. Which switch feature creates that split?
• A hotel front-desk printer link shows late collisions and input errors. One switch port is locked to 100 full and the printer is set to auto. Which change matches the two ends?
• A school wants visitors to see a sign-in page before they reach the internet, and those visitors must not join the staff VLAN. Which design fits?
• A warehouse wants forty access points to receive one configuration and to coordinate roaming from a controller. Which design fits?
• Two warehouse switches must carry several VLANs across one uplink, with each VLAN identified by a tag. Which method does that?
• A factory and its parts supplier must exchange routes between their separate autonomous systems. Which protocol is built for that exchange?
• A factory router has one LAN port that must act as the gateway for three VLANs. The switch trunks all three VLANs to that port. How should the router be configured?
• A campus access point operating on 5 GHz leaves its channel as soon as it detects radar. Which behavior is that?
• A library wants dual-band clients encouraged onto 5 GHz so the crowded 2.4 GHz band stays usable for devices that need it. Which feature does that?
• A campus wants an advanced distance-vector routing protocol that can keep a backup feasible successor ready for a fast cutover. Which protocol is that?
• A retail mail server must always appear on one dedicated public address that maps to exactly one private address. Which translation is that?
• On a warehouse switch running classic spanning tree, which port state is the one that actually forwards user frames?
• A data-center switch is labeled port-side intake, so it pulls cool air in through the port face. Which way should that face be installed?
• A library switch has no VLAN 40 yet, and a new catalog PC must be an access port in VLAN 40. What has to happen on the switch before that assignment will stick?
• Scanners in a warehouse should use the layer-3 switch as their gateway for VLAN 20. The gateway address must be configured on a virtual interface that belongs to VLAN 20 on that switch. Which interface is that?
• A data-center router learns the same server prefix by OSPF on two paths. One path has a lower OSPF cost than the other. Which path does OSPF place in the routing table?
• A retail edge router should send unknown internet destinations to the ISP and should not learn a route for every public prefix. Which route does that job?
• Horizontal cables in a school should be installed so a closet switch can be replaced with short patch cords and nobody has to re-terminate the cable inside the wall. Where should those runs land?
• A campus must revoke one departing student without changing a passphrase that every other student still uses. A RADIUS server is already available. Which wireless authentication fits?
• A new OSPF area on a campus was connected only to area 2. Routers in the new area cannot complete inter-area routing. Which change follows the OSPF design rule?
• Campus users sit on VLAN 20, and the building uplink still has to have a native VLAN. Which native VLAN setting keeps untagged frames out of the user VLAN?
• A wall jack in a warehouse office feeds one PC. The switch port should accept only that PC's untagged user VLAN and should refuse tagged frames from the user. How should the port be set?
• A hotel branch router shows two routes for the same 10.4.0.0/16 prefix. The static route lists administrative distance 1 and the OSPF route lists 110. Which route is installed?
• On a non-root access switch in a factory, one forwarding port is that switch's best path toward the root bridge. Which spanning-tree role is that port?
• Two student laptops in a campus lounge pass files straight to each other, and no access point takes part in the exchange. Which wireless arrangement is that?
• Two neighboring warehouse access points both use 80 MHz channels in the 5 GHz band, and clients between them show high retries. SSIDs and security already match. Which change addresses the overlap?
• One distribution switch is set to bundle two uplinks with LACP. The peer switch leaves those ports as separate access ports, and no bundle forms. What must change?
• A data room in a courthouse must have fire suppression that will not soak the switches and routers if it discharges. Which choice fits the equipment?
• A retail closet's switches are logging thermal alarms. The room is hot and the intake air is above the vendor's operating range. Humidity is normal and the UPS is idle. Which condition is the fault?
• A warehouse has power in every aisle and no Ethernet drop for most aisles. Access points must backhaul by radio through neighboring access points to the wired network. Which design fits?
• A campus edge learns internal routes from OSPF, which uses administrative distance 110 on this router. A backup static route for the same prefix uses distance 200 and should be used only if the OSPF route disappears. What is that static route?
• A square hotel lobby needs wireless coverage in every direction around one ceiling access point. Which antenna fits that room?
• A PC on a campus access port waits through listening and learning before it can request a DHCP lease. The port connects only to that PC. Which change fits?
• Two routers at a clinic share a virtual gateway address. After a failure the backup held that address. When the preferred router returned, the virtual address moved back to it. Which feature did that?
• Empty gaps in a data-center rack let hot exhaust curl around into the switch intakes. Which install practice closes those gaps?
• A hotel SSID is enabled only on the 6 GHz band. A laptop that has only 2.4 GHz and 5 GHz radios cannot join it. Which limitation explains that?
• Laptops in a library must associate to an access point that is connected to the wired network. They must not talk only to each other. Which wireless mode is this?
• A cafe has one access point, no wireless controller, and no second access point to relay through. Which access-point mode fits?
• Two routers in a store share a virtual gateway address. DHCP gives clients router A's physical address. When A fails, clients do not follow router B. Which change fixes the handoff?
• Campus wall ports already forward immediately for PCs. A switch plugged into one of those jacks must be kept out of spanning tree. Which control should be added on those ports?
• Handheld scanners at a warehouse cannot use WPA3, and the site has no RADIUS server. The wireless link still needs a passphrase. Which security choice fits?
• A campus is turning up a new copper uplink between two switches. Which setting avoids a duplex mismatch on that link?
• Guest laptops at a hotel must reach the internet and must not reach each other. Which wireless control enforces that separation?