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300-410 Practice Question: Which TWO statements about the 'distance' command…
Which TWO statements about the 'distance' command in Cisco IOS routing protocols are true? (Choose TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Under EIGRP, the 'distance eigrp <internal-distance> <external-distance>' command sets different ADs for internal and external routes.
The distance command can be used to modify the administrative distance for routes learned via a routing protocol. It can be applied globally or with an access-list or prefix-list to match specific routes. The command does not affect the AD of routes from other protocols. The distance value must be between 1 and 255. The command can be used under EIGRP, OSPF, RIP, and BGP, but the syntax varies slightly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Under EIGRP, the 'distance eigrp <internal-distance> <external-distance>' command sets different ADs for internal and external routes.
Why this is correct
Correct. EIGRP allows separate AD configuration for internal and external routes using the 'distance eigrp' command.
- ✓
Under OSPF, the 'distance ospf <intra-area> <inter-area> <external>' command sets AD for different route types.
Why this is correct
Correct. OSPF supports setting AD for intra-area, inter-area, and external routes separately using the 'distance ospf' command.
- ✗
The 'distance' command can be used to change the AD of connected routes.
Why it's wrong here
Incorrect. Connected routes have a fixed AD of 0 and cannot be modified by the distance command under a routing protocol. They are not learned via a routing protocol.
- ✗
The 'distance' command requires a route-map to match specific prefixes in all routing protocols.
Why it's wrong here
Incorrect. While some protocols (like BGP) can use route-maps, others (like EIGRP and OSPF) can use access-lists or prefix-lists directly with the distance command. Route-maps are not mandatory.
- ✗
The 'distance' command can be used to set an AD of 0 for a specific route.
Why it's wrong here
Incorrect. The AD range is 1 to 255. An AD of 0 is reserved for connected routes and cannot be assigned via the distance command.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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