Which Route Would Have to Go Down in Order for This Static Route to Appear in the Routing Table?

Introduction To Cisco 200-301 Exam Actual Questions

Preparing for the Cisco 200-301 exam requires a deep understanding of networking concepts, including static and dynamic routing. One common question that arises is: "Which route would have to go down in order for this static route to appear in the routing table?" This is a critical topic for anyone aiming to pass the CCNA 200-301 exam and master network routing configurations.  

In this blog, we will explore:  

• The role of static routes in routing tables  
• How administrative distance (AD) affects route selection  
• Scenarios where a static route becomes active  
• Practical examples with Cisco 200-301 exam actual questions  

By the end, you'll have a clear understanding of when and why a static route appears in the routing table, helping you tackle similar questions in the Cisco 200-301 Exam Actual Questions.  

Understanding Routing Tables and Static Routes  

What Is a Routing Table?  

• A routing table is a database stored in a router that contains information about:  
• Directly connected networks  
• Remotely learned networks (via dynamic routing protocols like OSPF or EIGRP)  
• Statically configured routes  

The router uses this table to determine the best path for forwarding traffic.  

What Are Static Routes?  

Static routes are manually configured routes that define a specific path for traffic. Unlike dynamic routes (learned via protocols like OSPF or RIP), static routes do not change unless modified by an administrator.  

Example of a Static Route:  

• ip route 192.168.1.0 255.255.255.0 10.0.0.2  
• This command tells the router:  
• Destination Network: 192.168.1.0/24  
• Next-Hop IP: 10.0.0.2  

When Does a Static Route Appear in the Routing Table?  

A static route only appears in the routing table if:  

1. The next-hop IP is reachable (the router can ping it).  

2. No better route exists (based on Administrative Distance).  

Key Concept: Administrative Distance (AD)  

Administrative Distance (AD) is a measure of trustworthiness of a route. Lower AD values are preferred.  

Scenario: When a Static Route Takes Over  

Imagine a router has two possible paths to a network:  

1. Dynamic Route (OSPF, AD = 110)  

2. Static Route (AD = 1)  

The router will always prefer the static route because of its lower AD. However, if the static route’s next-hop becomes unreachable, the router will fall back to the OSPF route.  

Exam-Style Question:  

Which route would have to go down in order for this static route to appear in the routing table?"  

Answer:  

1. The static route will appear only if the currently active route (with a higher AD) fails. For example:  
2. If an OSPF route (AD=110) is currently in the routing table, the static route (AD=1) will only appear if the OSPF route goes down.  
3. If a directly connected route (AD=0) exists, the static route will never appear unless the connected interface fails.  

Practical Example: Static Route Activation  

Let’s consider a real-world scenario:  

Network Topology:  

Router A has two paths to Network X:  

Path 1: OSPF-learned route (AD = 110) via Router B  

Path 2: Static route (AD = 1) via Router C  

Current Routing Table:  

• O     192.168.1.0/24 [110/20] via 10.0.0.2  
• S     192.168.1.0/24 [1/0] via 10.0.0.3 (inactive)  

What Happens If the OSPF Route Fails?  

1. Router A detects that the OSPF route is no longer available.  

2. The static route (with AD=1) is now the best available path.  

3. The static route appears in the routing table and traffic flows via Router C.  

How This Applies to the Cisco 200-301 Exam  

The Cisco 200-301 Certification frequently tests your understanding of:  

• Route preference (AD values)  
• Static vs. dynamic route behavior  
• Troubleshooting routing issues  

Sample Exam Question:  

Q: A router has the following routes for 192.168.5.0/24:  

• A static route (AD=1) via 10.1.1.1  
• An OSPF route (AD=110) via 10.2.2.2  

Which route will be active, and under what conditions will the static route take over?  

Conclusion  

Understanding when a static route appears in the routing table is crucial for the Cisco 200-301 exam. Remember:  

1. Static routes (AD=1) are preferred over dynamic routes (e.g., OSPF, RIP).  

2. A static route only appears if no better (lower AD) route exists.  

3. If a higher AD route fails, the static route becomes active.  

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Sample Questions for Cisco 200-301 Exam

Actual exam question from Cisco's 200-301 Dumps

Which protocol is used by an IPv6-enabled host to automatically configure its own link-local address?

A) DHCPv6
B) ARP
C) ICMPv6
D) NDP (Neighbor Discovery Protocol)