Cisco CCNA (200-301)IP ConnectivityEasy
A technician runs 'show ip route' on a branch router and sees the following output: C 10.1.1.0/24 is directly connected, GigabitEthernet0/1 L 10.1.1.1/32 is directly connected, GigabitEthernet0/1 O 10.2.2.0/24 [110/2] via 10.1.1.2, 00:01:12, GigabitEthernet0/1 S 0.0.0.0/0 [1/0] via 10.1.1.254 Which line represents a manually configured default route?
- AL 10.1.1.1/32 is directly connected, GigabitEthernet0/1
- BC 10.1.1.0/24 is directly connected, GigabitEthernet0/1
- CO 10.2.2.0/24 [110/2] via 10.1.1.2, 00:01:12, GigabitEthernet0/1
- DS 0.0.0.0/0 [1/0] via 10.1.1.254
Show answer & explanationAnswer & explanation
Correct answer: D. S 0.0.0.0/0 [1/0] via 10.1.1.254
The 'S' code identifies a static route, and 0.0.0.0/0 is the default route matching any destination not covered by a more specific entry. The [1/0] shows the default AD (1) for static routes and metric 0.
Why the other options are wrong
- A. 'L' marks a local host route for the router's own interface address.
- B. 'C' marks a directly connected network, not a configured default route.
- C. 'O' marks an OSPF-learned route to a specific /24 network, not the default route.
Routing Table Codes
The leftmost letter code in 'show ip route' output identifies how each route was learned (C=connected, L=local, S=static, O=OSPF, D=EIGRP).
- C = directly connected interface network
- L = local /32 (or /128) address of the router itself
- S* or S with 0.0.0.0/0 indicates a static default route
Memory trick: C-L-O-S-e reading of the code column tells you the route's origin.