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At a media studio, a network operations engineer reviews the IPv4 routing table containing 172.27.159.0/24. Which statement correctly describes the prefix field?
An IPv4 prefix such as 172.27.159.0/24 defines the masked destination address space considered in route lookup. More specific matching routes may override it for subsets.
The routing-table prefix describes a set of possible destination IP addresses for forwarding. Source matches are an ACL concept and are not implied by this RIB entry.
A hostname is a device identity label, not an IPv4 network and mask in the RIB.
An IPv4 prefix is the destination network and mask; administrative distance is an independent numeric route-source preference.
An IOS routing-table entry reads O 10.132.85.0/24 [110/44] via 172.16.140.1. Which interpretation of the bracketed fields is accurate?
IOS uses [administrative distance/metric] notation, so [110/44] means AD 110 and metric 44. AD ranks route sources for the same prefix.
The prefix 10.132.85.0/24 already specifies the mask, and TTL is a packet header field rather than bracket metadata.
This reverses the bracket field order. A different route source would not change the display convention.
Syslog severity/facility values are recorded by logging, not inside IP routing table path brackets.
A routing table line shows `O 10.9.0.0/16 [110/30] via 192.0.2.6, GigabitEthernet0/2`. Which token identifies the exit interface used to forward packets?
In the displayed entry, the text after the next-hop address specifies the outgoing interface. The O code denotes the route source and the bracketed values are AD/metric.
This is the destination network prefix used for the route lookup, not a physical or logical egress port.
This is the Layer 3 next-hop IP address; it identifies the next router, not the local outgoing interface name.
These bracketed values are administrative distance and route metric, not interface identifiers.
After an interface and routing update, IOS displays route code O next to prefix 10.126.123.0/24. Which route-source classification is correct for code O?
IOS route-table code O means OSPF-learned network; it identifies the route source or type used for prefix 10.126.123.0/24. The destination mask and forwarding address appear elsewhere in the route entry.
Link error counters are interface statistics, not route-source identifiers for 10.126.123.0/24.
IOS uses `R` for RIP and `O` for OSPF; these are distinct protocol-source codes in the routing table.
In Cisco IOS `O` denotes OSPF learned routes, while connected networks use `C`; next-hop reachability does not change the route source code.
On a Cisco router, `show ip route` displays `O*E2 0.0.0.0/0 [110/1] via 10.0.0.2`. What does this notation mean?
`O` identifies OSPF, `E2` an external type-2 route, `*` a candidate default and the bracket fields AD/metric. The displayed path may be selected as gateway of last resort if valid.
The connected route code is `C`; a /0 prefix does not make a route directly connected.
RIP uses `R` and normally AD 120. In this entry `110` is AD and `1` is the OSPF route metric, not a RIP hop count.
An asterisk marks a candidate default route; local interface addresses appear with code `L` and host masks.
At a biotech lab, an implementation partner reads an IOS route-table line beginning with code C for 172.17.49.0/24. Which interpretation of that code is accurate?
Routing code C indicates directly connected network: the router has a directly attached interface for this prefix. The code describes how the route entered the RIB.
DHCP pool configuration is separate from the forwarding table. The C entry is a route record.
Flooding is an Ethernet bridging behavior; a routing-table code identifies a Layer 3 route source.
BGP-learned routes use B, not C; the observed code has a different routing origin.
At a telecom operations room, the infrastructure lead sees route entry D 172.17.80.0/24 [90/95] via 10.163.0.1. What do the bracketed values represent in this IOS route entry?
In IOS bracket notation [90/95], the first value 90 is administrative distance and the second 95 is the route metric. AD compares different route sources; metric compares paths within the route source.
Syslog facility/severity metadata belongs to logging configuration, not route installation bracket values.
Values in brackets after the route code are not an IPv4 mask and generic hop count. The network prefix specifies the mask separately.
This reverses the documented bracket order. Administrative distance is 90, not 95, in [90/95].
At a university, a network administrator interprets static route S 172.23.105.0/24 [1/0] via 10.82.0.1. What does the via field mean?
The via 10.82.0.1 field identifies the Layer 3 next-hop router for traffic matching 172.23.105.0/24. The outgoing interface and adjacency resolution determine actual Layer 2 forwarding.
A route next-hop is not a DHCP server parameter. DHCP lease processing is independent from RIB next hops.
10.82.0.1 is an IPv4 address, whereas MAC addresses identify Ethernet destinations; ARP can resolve the next hop to a MAC.
The route destination is the listed prefix 172.23.105.0/24, not the value in the via field. A next-hop can serve many destinations.
At a telecom operations room, a network administrator reviews the IPv4 routing table containing 172.21.197.0/24. Which statement correctly describes the prefix field?
An IPv4 prefix such as 172.21.197.0/24 defines the masked destination address space considered in route lookup. More specific matching routes may override it for subsets.
The routing-table prefix describes a set of possible destination IP addresses for forwarding. Source matches are an ACL concept and are not implied by this RIB entry.
Destination prefix and outgoing interface are separate RIB fields; a /24 describes a network, not a single port address.
A hostname is a device identity label, not an IPv4 network and mask in the RIB.
An IOS routing table shows route code `O E2` for prefix 203.0.113.0/24. What does the E2 qualifier indicate?
OSPF imports external destinations via redistribution. E2 marks the external type-2 metric scheme; unlike an ordinary intra-area O route, it originated outside the OSPF domain.
Directly connected IPv4 networks normally appear with C, whereas O E2 identifies an OSPF external route.
Static routes are shown with S, not O E2, unless redistributed and then appearing as OSPF routes elsewhere.
Local host routes appear as L on supported IOS displays, not as OSPF external type 2 routes.
A router displays `O 192.0.2.0/24 [110/20] via 10.1.1.2, GigabitEthernet0/1`. A technician needs to identify the next-hop router's IPv4 address, not the local outgoing interface. What is it?
The `via` field gives the adjacent Layer 3 next-hop IP, which is resolved through the local egress interface Gi0/1. The network ID, AD and interface name have different roles.
The destination network is the traffic being reached, not the adjacent router address for the outgoing frame.
Gi0/1 identifies the local exit interface; it is a textual interface name rather than an IP next-hop address.
110 is the OSPF administrative distance in the bracketed route attributes, not an adjacent IP address.
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