The answer is that BGP is relevant at the network edge because it is the protocol designed for routing between organizations and providers across different autonomous systems. Unlike interior gateway protocols such as OSPF or EIGRP, which handle routing inside a single network, BGP’s core function is to exchange reachability information between separate administrative domains, making it the natural choice where an enterprise connects to an ISP or where multiple providers peer. On the CCNA 200-301 v2 exam, this question tests your ability to distinguish BGP’s role as an exterior gateway protocol from interior protocols, often appearing in scenarios about multi-provider or Internet edge connectivity. A common trap is confusing BGP with a campus or data-center protocol, so remember that if the question involves “between” different companies or providers, BGP is the answer. Memory tip: think of BGP as the “border guard” between networks, not the “city planner” inside one.
CCNA IP Routing Practice Question
This 200-301 practice question tests your understanding of ip routing. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: bGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which two statements accurately describe why BGP is often relevant at an Internet or multi-provider edge?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It is associated with routing between autonomous systems.
BGP is often relevant at the edge because it is associated with route exchange between autonomous systems and large external routing domains. In practical terms, this makes it a natural protocol to discuss where organizations connect to providers or exchange external reachability. It is not just another interior campus protocol.
The question is about conceptual fit, not deep BGP attribute tuning.
Key principle: BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
It is associated with routing between autonomous systems.
Why this is correct
This is correct because inter-AS routing is the classic BGP scope.
Related concept
BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.
✓
It is used for routing between organizations and providers at the network edge.
Why this is correct
This is correct because BGP is strongly associated with that edge role.
Related concept
BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.
✗
It is mainly used to replace STP on access switches.
Why it's wrong here
This is wrong because BGP does not replace spanning-tree.
When this WOULD be correct
In a question that asks about protocols used for Layer 2 network redundancy or loop prevention in local area networks, stating that BGP replaces STP could be correct if the context involves discussing the evolution of network protocols in specific scenarios, such as in a theoretical or experimental setup.
✗
It is required before DHCP relay can function.
Why it's wrong here
This is wrong because DHCP relay does not depend on BGP.
When this WOULD be correct
If the question were about the prerequisites for enabling DHCP services in a network that also involves routing protocols, a statement about BGP being required for DHCP relay could be correct if it specified a scenario where BGP influences routing decisions that affect DHCP traffic flow.
✗
It is the protocol used by CAPWAP for AP discovery.
Why it's wrong here
This is wrong because CAPWAP is a separate wireless-control concept.
When this WOULD be correct
If the exam question asked about protocols used specifically for wireless access point management or discovery, then option E would be correct, as CAPWAP is indeed the protocol used for AP discovery in wireless networks.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓It is associated with routing between autonomous systems.Correct answer▾
Why this is correct
This is correct because inter-AS routing is the classic BGP scope.
✗It is mainly used to replace STP on access switches.Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because BGP (Border Gateway Protocol) is a routing protocol used for exchanging routing information between autonomous systems, not for replacing Spanning Tree Protocol (STP) on access switches, which is used to prevent loops in Ethernet networks.
★ When this WOULD be the correct answer
In a question that asks about protocols used for Layer 2 network redundancy or loop prevention in local area networks, stating that BGP replaces STP could be correct if the context involves discussing the evolution of network protocols in specific scenarios, such as in a theoretical or experimental setup.
Why candidates choose this
Candidates may find this option tempting due to a misunderstanding of BGP's role in network architecture, confusing it with other protocols that manage network topology and redundancy, such as STP.
✗It is required before DHCP relay can function.Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because BGP (Border Gateway Protocol) is not related to DHCP relay functionality; DHCP relay operates at the network layer and is concerned with forwarding DHCP messages, while BGP is a routing protocol used for inter-autonomous system routing.
★ When this WOULD be the correct answer
If the question were about the prerequisites for enabling DHCP services in a network that also involves routing protocols, a statement about BGP being required for DHCP relay could be correct if it specified a scenario where BGP influences routing decisions that affect DHCP traffic flow.
Why candidates choose this
Candidates might choose this option due to a misunderstanding of network protocols, confusing BGP's role in routing with the operational requirements of DHCP, leading them to incorrectly associate the two concepts.
✗It is the protocol used by CAPWAP for AP discovery.Wrong answer — click to see why▾
Why this is wrong here
Option E is incorrect because CAPWAP (Control and Provisioning of Wireless Access Points) is not related to BGP; it is a protocol used for managing wireless access points, not for routing between autonomous systems.
★ When this WOULD be the correct answer
If the exam question asked about protocols used specifically for wireless access point management or discovery, then option E would be correct, as CAPWAP is indeed the protocol used for AP discovery in wireless networks.
Why candidates choose this
Candidates may find option E tempting due to the familiarity of CAPWAP in discussions about network protocols and may mistakenly associate it with BGP due to their shared relevance in network management.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking BGP for an internal protocol or confusing it with unrelated network functions. For example, some might incorrectly believe BGP replaces STP on access switches or is necessary for DHCP relay to work. These are incorrect because BGP operates between autonomous systems for external routing, while STP manages Layer 2 loops and DHCP relay forwards broadcast requests. Misunderstanding BGP’s scope leads to selecting wrong answers that describe internal or unrelated protocols, so it’s important to focus on BGP’s role in inter-AS routing and external route exchange at the Internet or multi-provider edge.
Detailed technical explanation
How to think about this question
Border Gateway Protocol (BGP) is the primary routing protocol used to exchange routing information between different autonomous systems (ASes) on the Internet. Unlike interior gateway protocols such as OSPF or EIGRP, which operate within a single AS, BGP is designed to handle inter-AS routing, making it essential for Internet edge and multi-provider environments. BGP uses path vector routing, advertising network reachability and policy information to ensure scalable and policy-driven routing decisions across diverse networks.
In Cisco and CCNA contexts, BGP is typically deployed at the edge of an organization’s network where it connects to one or more Internet Service Providers (ISPs) or external networks. This external BGP (eBGP) session facilitates route exchange between autonomous systems, allowing the organization to manage multiple upstream providers or peers. BGP’s policy controls and path attributes enable administrators to influence route selection and traffic flow, which is critical for multi-homed environments and Internet edge routing.
A common exam trap is confusing BGP’s role with internal protocols or unrelated functions such as STP or DHCP relay. BGP does not replace spanning-tree protocol on access switches nor is it required for DHCP relay operation. Understanding that BGP’s relevance is strictly tied to inter-AS routing and external route exchange helps avoid this confusion. Practically, BGP’s use at the edge supports scalable Internet connectivity and multi-provider redundancy, which is a key concept for CCNA candidates to grasp.
KKey Concepts to Remember
BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.
BGP is commonly deployed at the network edge to exchange routes with external providers or peers using eBGP sessions.
BGP uses path vector routing and attributes to influence route selection and support multi-homed network environments.
BGP does not replace Layer 2 protocols like STP, which prevent loops within a LAN environment.
DHCP relay operates independently of BGP and does not require BGP for forwarding DHCP requests across subnets.
CAPWAP is a wireless control protocol unrelated to BGP and is not used for AP discovery in routing contexts.
Understanding BGP’s external routing role helps avoid confusing it with internal routing protocols like OSPF or EIGRP.
BGP’s policy-based routing capabilities allow organizations to control inbound and outbound traffic at the Internet edge.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 200-301 question in full detail.
Review bGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity., then practise related 200-301 questions on the same topic to reinforce the concept.
IP Routing — This question tests IP Routing — BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity..
What is the correct answer to this question?
The correct answer is: It is associated with routing between autonomous systems. — BGP is often relevant at the edge because it is associated with route exchange between autonomous systems and large external routing domains. In practical terms, this makes it a natural protocol to discuss where organizations connect to providers or exchange external reachability. It is not just another interior campus protocol.
The question is about conceptual fit, not deep BGP attribute tuning.
What should I do if I get this 200-301 question wrong?
Review bGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
BGP advertises routing information between autonomous systems, enabling inter-AS routing essential for Internet connectivity.
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