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 uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet.. 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 statement best describes BGP at a basic CCNA level?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It is a path-vector routing protocol commonly associated with routing between autonomous systems.
BGP is a path-vector routing protocol associated with exchanging routing information between autonomous systems. In practical terms, it is the protocol most people associate with interdomain routing and large-scale Internet-style route exchange. At CCNA level, the important point is not every attribute detail, but the fact that BGP is about path-vector routing across AS boundaries.
This separates it clearly from interior protocols such as OSPF or EIGRP.
Key principle: BGP uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet.
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 a path-vector routing protocol commonly associated with routing between autonomous systems.
Why this is correct
This is correct because that is the core identity of BGP.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
BGP uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet.
✗
It is the default spanning-tree protocol for switches.
Why it's wrong here
This is wrong because BGP is not a switching-loop prevention protocol.
When this WOULD be correct
If the question asked about the default protocol used for preventing loops in Ethernet networks or managing switch port states, then option B would be correct, as the default spanning-tree protocol for switches is indeed relevant in that context.
✗
It is a WLAN security standard.
Why it's wrong here
This is wrong because BGP is a routing protocol, not a wireless security technology.
When this WOULD be correct
If the exam question asked for a description of a WLAN security protocol, such as 'Which of the following is a standard for securing wireless local area networks?', then option C would be correct, as it could refer to a specific WLAN security standard like WPA or WPA2.
If the exam question were to ask about protocols that perform address resolution in IPv4 networks, or if it specifically asked for a protocol that replaces ARP, then option D could be correct in that context, as it would imply a hypothetical scenario where a new protocol has replaced ARP.
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 a path-vector routing protocol commonly associated with routing between autonomous systems.Correct answer▾
Why this is correct
This is correct because that is the core identity of BGP.
✗It is the default spanning-tree protocol for switches.Wrong answer — click to see why▾
Why this is wrong here
Option B is incorrect because BGP (Border Gateway Protocol) is not related to spanning tree protocols; instead, it is used for routing between different autonomous systems in the Internet.
★ When this WOULD be the correct answer
If the question asked about the default protocol used for preventing loops in Ethernet networks or managing switch port states, then option B would be correct, as the default spanning-tree protocol for switches is indeed relevant in that context.
Why candidates choose this
Candidates may select this option due to confusion between routing protocols and layer 2 protocols, as both are fundamental concepts in networking, leading to a mix-up in their specific roles.
✗It is a WLAN security standard.Wrong answer — click to see why▾
Why this is wrong here
This option is incorrect because BGP (Border Gateway Protocol) is not related to WLAN security standards; it is a routing protocol used for exchanging routing information between different autonomous systems on the internet.
★ When this WOULD be the correct answer
If the exam question asked for a description of a WLAN security protocol, such as 'Which of the following is a standard for securing wireless local area networks?', then option C would be correct, as it could refer to a specific WLAN security standard like WPA or WPA2.
Why candidates choose this
Candidates may choose this option due to confusion between networking protocols and security standards, leading them to mistakenly associate BGP with WLAN security without understanding the specific functions of each.
✗It is a replacement for ARP in IPv4.Wrong answer — click to see why▾
Why this is wrong here
Option D is incorrect because ARP (Address Resolution Protocol) is used to map IP addresses to MAC addresses in a local network, while BGP (Border Gateway Protocol) is used for routing between different autonomous systems on the internet.
★ When this WOULD be the correct answer
If the exam question were to ask about protocols that perform address resolution in IPv4 networks, or if it specifically asked for a protocol that replaces ARP, then option D could be correct in that context, as it would imply a hypothetical scenario where a new protocol has replaced ARP.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of the roles of network protocols, confusing BGP's routing functions with the need for address resolution in IPv4, leading them to think of ARP in a broader context.
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 protocols unrelated to routing between autonomous systems. For example, some might confuse BGP with STP because both are fundamental protocols in networking but serve very different purposes—STP prevents switching loops in LANs, while BGP manages routing between ASes. Others may incorrectly associate BGP with WLAN security standards or ARP replacement, which are unrelated functions. This confusion arises because BGP’s name and function are less familiar at the CCNA level compared to more common protocols like OSPF or EIGRP. Recognizing BGP’s unique role as a path-vector protocol for inter-AS routing helps avoid these pitfalls.
Detailed technical explanation
How to think about this question
Border Gateway Protocol (BGP) is a path-vector routing protocol designed 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 manages routing policies and path selection across AS boundaries, making it the backbone protocol for interdomain routing. BGP uses attributes like AS path, next-hop, and local preference to determine the best path for routing traffic between large networks.
At the CCNA level, understanding BGP focuses on its role as an inter-AS routing protocol that maintains a table of network paths and selects routes based on policy rather than purely on metrics like bandwidth or delay. BGP establishes TCP sessions between peers (neighbors) to exchange routing updates, and it advertises reachable networks using path-vector information. This behavior contrasts with protocols like STP, which prevents switching loops, or WLAN security standards, which protect wireless networks.
A common exam trap is confusing BGP with other protocols or technologies such as STP, WLAN security, or ARP. BGP is not involved in loop prevention within a LAN, wireless encryption, or address resolution. Practically, BGP is essential for Internet service providers and large enterprises to control routing policies and ensure scalable, policy-based routing across multiple autonomous systems, which is a key distinction from interior routing protocols covered in CCNA.
KKey Concepts to Remember
BGP uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet.
BGP establishes TCP sessions with peers to reliably advertise reachable networks and maintain routing tables across AS boundaries.
BGP selects routes based on attributes like AS path and local preference rather than traditional metrics like bandwidth or delay.
BGP differs from interior routing protocols such as OSPF and EIGRP, which operate within a single autonomous system.
BGP is not involved in switching loop prevention, wireless security, or address resolution functions within a network.
BGP enables large-scale policy-based routing decisions essential for Internet service providers and enterprise edge networks.
Understanding BGP’s role as an inter-AS routing protocol helps avoid confusing it with unrelated protocols like STP or WLAN security standards.
BGP’s path-vector mechanism advertises the full path of ASes to prevent routing loops between autonomous systems.
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 uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
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 uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet., then practise related 200-301 questions on the same topic to reinforce the concept.
IP Routing — This question tests IP Routing — BGP uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet..
What is the correct answer to this question?
The correct answer is: It is a path-vector routing protocol commonly associated with routing between autonomous systems. — BGP is a path-vector routing protocol associated with exchanging routing information between autonomous systems. In practical terms, it is the protocol most people associate with interdomain routing and large-scale Internet-style route exchange. At CCNA level, the important point is not every attribute detail, but the fact that BGP is about path-vector routing across AS boundaries.
This separates it clearly from interior protocols such as OSPF or EIGRP.
What should I do if I get this 200-301 question wrong?
Review bGP uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet., then practise related 200-301 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
BGP uses path-vector routing to exchange routing information between different autonomous systems, enabling interdomain routing on the Internet.
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