IP Connectivity

CCNA · 75 questions

• A city clerk examines the edge router after adding a clinic subnet and sees a code letter next to the new route. What does that routing protocol code indicate?
• County courts staff read a routing table entry for a new clinic subnet. Which component identifies the destination network the router can reach?
• A public health clinic reviews a new route on the edge router. What does the network mask or prefix length on that entry tell the operator?
• A building permits desk looks up a clinic prefix in the edge routing table. Which field identifies where the router sends packets next for that destination?
• A fire district sees two sources advertising overlapping paths to a clinic subnet and checks the administrative distance on each candidate route. What does AD tell them?
• A police records bureau technician reads the edge router routing table after a new clinic subnet is added and sees two OSPF routes to the same prefix with different costs. Which field should the technician use to choose the preferred path within OSPF?
• A sanitation department engineer checks the edge router after adding a remote pump-station subnet and needs to confirm where unknown destinations are sent. Which routing-table concept identifies that fallback path?
• A wastewater plant operator reads a routing-table entry that begins with the code letter O after a new clinic subnet is learned. What does that routing protocol code indicate?
• A stormwater bureau technician reviews a routing-table line for a new clinic subnet and must identify which network the entry describes. Which component is the destination prefix?
• A tax assessor network tech reads a route for a new clinic subnet written as 10.55.8.0/22 and must interpret the network mask. What does that prefix length tell the technician?
• An election office engineer reads the edge router table after a new clinic subnet appears and must find where packets for that prefix are forwarded next. Which field identifies that next hop?
• A 911 PSAP technician sees the same clinic prefix learned from OSPF and from a static route and must understand which source the router prefers. Which routing-table field expresses that preference among sources?
• A municipal hospital campus engineer compares two OSPF paths to a new clinic subnet that share the same prefix and administrative distance. Which value decides the preferred path inside OSPF?
• A community college district admin verifies the edge router after a topology change and needs traffic for unknown destinations to leave toward the ISP. Which routing-table concept confirms that fallback?
• An airport authority technician reads a routing-table entry marked with S after a new clinic subnet is added manually. What does that routing protocol code mean?
• A building permits desk has both a 10.20.0.0/16 summary and a 10.20.40.0/24 route toward a clinic lab subnet on the edge router. For a packet to 10.20.40.15, which forwarding rule decides the path?
• A fire district edge router learns 10.30.5.0/24 from OSPF (AD 110) and also has a static route to the same prefix with AD 1. Which path does the router install for that prefix?
• A police records bureau router has two OSPF routes to the same clinic prefix with equal administrative distance but costs 20 and 45. How does the router choose the best path?
• A sanitation department has a summary static for 10.60.0.0/16 toward the core and a more-specific static for 10.60.18.0/24 toward a pump-station router. Where are packets to 10.60.18.40 forwarded?
• A wastewater plant configures a primary OSPF-learned path to a clinic subnet and a backup static route with administrative distance 210 to the same prefix. When does the floating static enter the routing table for forwarding?
• A stormwater bureau router receives two OSPF LSAs for the same equal-length clinic prefix with costs 15 and 30. Which statement correctly describes the forwarding choice?
• A tax assessor edge router has a network route 10.70.2.0/24 and a host route 10.70.2.50/32 for a VIP assessment server. Which path forwards packets destined to 10.70.2.50?
• An election office router has a directly connected interface for 10.80.1.0/24 and also receives an OSPF advertisement for 10.80.1.0/24 from a misconfigured neighbor. Which source does the router prefer for that prefix?
• A 911 PSAP engineer compares candidate routes and recalls the forwarding order. After administrative distance has already selected a single routing source for a prefix, what is compared next among remaining candidates from that source?
• A municipal hospital campus router has a default route 0.0.0.0/0, a 10.0.0.0/8 summary, and a 10.25.4.0/24 clinic route. For a packet to 10.25.4.20, which route is used?
• A community college district router learns the same /24 clinic prefix from EIGRP (AD 90) and OSPF (AD 110). Which route enters the routing table?
• An airport authority router has two candidate paths to the same clinic prefix from the same protocol with equal administrative distance. What breaks the tie for which path is preferred for forwarding?
• A police records bureau needs all unknown Internet-bound traffic from the edge router to reach the ISP after a WAN redesign. Which static routing approach meets that need?
• A sanitation department must reach a remote municipal subnet 10.90.16.0/24 through a neighboring router at 10.1.1.2 after a topology change. Which static route type is appropriate?
• A wastewater plant needs traffic for a single SCADA server at 10.91.5.20 to take a dedicated next hop different from the rest of its /24. Which static route accomplishes that?
• A stormwater bureau keeps a primary OSPF path to the treatment plant and wants a static backup that installs only if that path disappears. How should the floating static be configured?
• A tax assessor edge router must send unknown IPv4 destinations toward the civic Internet firewall. Which static configuration provides that gateway of last resort?
• An election office dual-stack edge must forward unmatched IPv6 traffic to the upstream provider. Which static meets that need?
• A 911 PSAP router must reach a remote clinic LAN at 10.40.12.0/24 across a leased WAN. Which IPv4 static best describes that path?
• A municipal hospital campus router must reach a remote building’s IPv6 LAN prefix 2001:db8:44:10::/64. Which static is appropriate?
• A community college district needs traffic for one records server at 10.88.5.20 to take a dedicated path. Which IPv4 static matches that requirement?
• An airport authority must pin IPv6 traffic for one dual-stack appliance at 2001:db8:9:1::50 to a specific uplink. Which static does that?
• A port authority’s primary WAN carries OSPF routes to the customs warehouse; a backup circuit should take over only when that WAN fails. What IPv4 design fits?
• A housing authority dual-stack site needs an IPv6 backup path that stays out of the table while a preferred dynamic IPv6 route is present. What approach is correct?
• Parks and recreation staff ask whether a default static should list a next-hop IP or only an exit interface on an Ethernet multipoint segment. What CCNA-level guidance applies?
• A fleet garage installs a static network route whose next hop is not on a directly connected subnet. What must the router be able to do for that static to forward?
• Emergency management has a /24 route to a shelter subnet but needs one VIP camera at 10.70.3.50 to use a different uplink. How does a host static accomplish that?
• A library consortium wants a backup static to remain standby while OSPF (AD 110) owns the primary path. Which administrative distance choice is correct for the floating static?
• A transit authority technician adds an IPv4 static to a park-and-ride LAN and must confirm it is active. What indicates successful installation?
• A water utility configures an IPv6 static to a remote SCADA /64 and needs to verify forwarding. What confirms the route is installed?
• School district IT adds an IPv4 default static on the edge router. What routing-table outcome should they expect for unmatched destinations?
• City hall must reach a remote annex VLAN 10.55.20.0/24 across a point-to-point municipal WAN. Which static network route design is appropriate?
• A stormwater bureau brings up single-area OSPFv2 between clinic WAN routers. Which condition is required for a neighbor adjacency to form?
• A tax assessor WAN uses a serial point-to-point link for single-area OSPFv2. What is true about DR/BDR election on that link type?
• An election office runs single-area OSPFv2 on an Ethernet segment shared by several clinic routers. Why does OSPF elect a DR and BDR there?
• A 911 PSAP wants a stable OSPFv2 identity on clinic WAN routers so neighbor relationships do not churn when interfaces flap. What should they configure?
• A municipal hospital campus verifies single-area OSPFv2 after enabling interfaces toward clinic routers. Which neighbor state indicates a successful adjacency for route exchange?
• A community college district configures OSPFv2 between exactly two WAN routers on a point-to-point circuit. Which network-type behavior should they expect?
• An airport authority Ethernet segment runs OSPFv2 among three routers with equal Hello parameters. Which factor most directly decides who becomes DR?
• A port authority notices OSPFv2 router IDs changing after WAN interfaces bounce because selection followed the highest IP. What practice prevents that instability?
• A housing authority designs OSPFv2 so clinic WAN routers and campus edge routers share one common area for all municipal prefixes. What does that single-area design mean at CCNA depth?
• Parks and recreation engineers cannot form an OSPFv2 adjacency between a recreation-center router and a clinic WAN peer. Hello/dead timers and area IDs differ on the shared link. What is the most likely concept-level cause?
• A fleet garage WAN uses a dedicated fiber point-to-point link between two OSPFv2 routers and sets the OSPF network type to point-to-point. What benefit does that choice provide?
• An emergency-management office runs OSPFv2 on a multi-access Ethernet segment connecting several municipal routers. Why does OSPF elect a Designated Router on that broadcast segment?
• A library consortium documents OSPFv2 router IDs on each clinic WAN router. What primary role does the OSPF router ID play?
• Transit authority staff need to confirm whether two single-area OSPFv2 routers have successfully become neighbors after a clinic WAN cutover. Which action best matches that CCNA verification goal?
• A water utility wants OSPFv2 enabled so pump-station and treatment-plant prefixes exchange inside one area only. What correctly describes that single-area OSPFv2 goal?
• School district IT runs OSPFv2 on an Ethernet LAN where a Backup Designated Router is present. What is the BDR’s main purpose if the Designated Router fails?
• City hall campus engineers set OSPFv2 network types so a fiber point-to-point WAN peer matches the garage router’s expectation. Why does choosing the correct OSPF network type matter?
• Animal control changes a manually configured OSPFv2 router ID on a clinic edge router. What operational awareness should the team have?
• Code enforcement cannot bring up OSPFv2 neighbors on a link where one router is in area 0 on 10.10.10.0/30 and the peer is in area 5 on 10.20.20.0/30. What prerequisite issue should they fix first?
• A public works yard needs municipal LAN and WAN prefixes advertised into OSPFv2 so other single-area routers learn those routes. What action achieves that goal?
• A city clerk wants two edge routers to share a virtual gateway IP so desk PCs keep one stable default gateway. Which approach matches that first-hop redundancy purpose?
• County courts compare gateway redundancy so PCs keep one default gateway while one router forwards and another stands ready. Which FHRP concept describes that behavior?
• A public health clinic plans for WAN router failure without re-addressing every PC’s default gateway. What does FHRP provide in that situation?
• A building permits desk has two Layer 3 exits serving the same access VLAN of clerk PCs. When is a first hop redundancy protocol appropriate?
• A fire district verifies behavior after the standby FHRP router becomes active. What should remain continuous for hosts at a conceptual level?
• Police records staff consider giving half the bureau PCs gateway A and half gateway B with no redundancy protocol. Why is an FHRP virtual IP a better first-hop design?
• Sanitation engineers explain that FHRP protects the first hop for hosts on a VLAN. How does that scope differ from a dynamic routing protocol?
• A wastewater plant schedules maintenance on one gateway router serving the public-health VLAN. How does FHRP help operations during that window?