CCNA 200-301 v1.1 reference — IP Connectivity

The routing table

Read every component of a routing table entry: protocol codes, prefix and mask, next hop, administrative distance, metric and the gateway of last resort.

Objective 3.1v1.1 exam target

Quick Reference Handbook

$ show ip route (annotated)

Codes: C - connected, S - static, O - OSPF, D - EIGRP, R - RIPThe first letter(s) identify the route source.

S* 0.0.0.0/0 [1/0] via 10.0.0.2* marks the gateway of last resort candidate.

O 10.2.0.0/24 [110/20] via 10.0.0.2, 00:12:31, Gi0/1OSPF route, AD 110, metric 20.

C 10.0.0.0/30 is directly connected, Gi0/1Connected — installed automatically with AD 0.

L 10.0.0.1/32 is directly connected, Gi0/1Local — the router's own interface address.

Routing table protocol codes

Code	Source	Meaning
C	Connected	Network of an up interface
L	Local	The interface's own /32 host route
S	Static	Manually configured
S*	Static default	Candidate gateway of last resort
O	OSPF	Intra/inter-area link-state route
O IA	OSPF inter-area	Route learned from another OSPF area
D	EIGRP	Internal EIGRP route
D EX	EIGRP external	Redistributed into EIGRP
R	RIP	Distance-vector RIP route
B	BGP	Border Gateway Protocol route

Default administrative distances

Lower is preferred — but AD compares candidate routes for the SAME prefix, never for different prefixes.
Source	AD	Notes
Connected	0	Cannot be beaten — same prefix always wins
Static	1	Floating statics raise this deliberately
eBGP	20	External BGP (context)
EIGRP (internal)	90
OSPF	110
RIP	120
iBGP	200	Peers within the same AS (BGP interior sessions)
Unreachable	255	Route is never installed

Lower is preferred — but AD compares candidate routes for the SAME prefix, never for different prefixes.

The next hop is the IP the packet goes to on the local link (the router resolves it via ARP/ND). The metric (the second bracket number) compares routes inside one protocol — OSPF cost, EIGRP composite, RIP hop count. It means nothing across protocols. The gateway of last resort is the default route the router uses when nothing else matches.

On this page

show ip route (annotated)
Routing table protocol codes
Default administrative distances
The next hop is the IP the packet goes t…

Handbook sections

Related resources

Practise this topic Source topic 11: Routing Fundamentals & Static Routing Practise topic 11 deck Source topic 24: Dynamic Routing & Administrative Distance Practise topic 24 deck

Sources

Cisco CCNA 200-301 v1.1 Exam Topics (official PDF) — reviewed 2026-11-02
Cisco — IP Addressing Services Command Reference — reviewed 2026-11-02

Targets CCNA 200-301 v1.1 objectives. Supplemental blocks are labeled beyond exam scope.