- A
Router: routes between networks; Switch: forwards within LAN; Hub: repeats signals; Firewall: filters traffic; AP: provides Wi-Fi; Modem: converts digital to analog for WAN
This correctly matches each device to its primary role as defined in networking fundamentals. Routers operate at Layer 3 to connect different networks, switches at Layer 2 for local forwarding, hubs at Layer 1 for signal repeating, firewalls for security filtering, access points for wireless connectivity, and modems for WAN signal conversion.
- B
Router: forwards within LAN; Switch: routes between networks; Hub: filters traffic; Firewall: repeats signals; AP: converts digital to analog; Modem: provides Wi-Fi
Why wrong: This is incorrect because it swaps the roles of routers and switches, and misassigns functions to hubs, firewalls, APs, and modems. Routers route between networks, not within a LAN; switches forward within a LAN; hubs repeat signals, not filter; firewalls filter traffic, not repeat; APs provide Wi-Fi, not convert signals; modems convert digital to analog, not provide Wi-Fi.
- C
Router: filters traffic; Switch: repeats signals; Hub: routes between networks; Firewall: forwards within LAN; AP: converts digital to analog; Modem: provides Wi-Fi
Why wrong: This is incorrect because it assigns firewall functionality to a router, hub function to a switch, routing to a hub, switching to a firewall, and misplaces AP and modem roles. A firewall filters traffic, not a router; a switch forwards within a LAN, not repeat signals; a hub repeats signals, not route; a firewall filters, not forwards; an AP provides Wi-Fi, not convert; a modem converts, not provides Wi-Fi.
- D
Router: provides Wi-Fi; Switch: converts digital to analog; Hub: routes between networks; Firewall: forwards within LAN; AP: filters traffic; Modem: repeats signals
Why wrong: This is incorrect because it assigns wireless functionality to a router, modem function to a switch, routing to a hub, switching to a firewall, firewall function to an AP, and repeating to a modem. Routers do not provide Wi-Fi (APs do); switches do not convert signals (modems do); hubs do not route; firewalls do not forward within a LAN; APs do not filter traffic (firewalls do); modems do not repeat signals (hubs do).
CCNA Network Infrastructure and Connectivity Practice Question
This 200-301 practice question tests your understanding of network infrastructure and connectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: a router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path.. 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.
Match each common network device or concept to its primary role.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
Router: routes between networks; Switch: forwards within LAN; Hub: repeats signals; Firewall: filters traffic; AP: provides Wi-Fi; Modem: converts digital to analog for WAN
Router routes between networks; switch forwards within LAN; hub repeats signals; firewall filters traffic; AP provides Wi-Fi; modem converts digital to analog for WAN.
Key principle: A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Router: routes between networks; Switch: forwards within LAN; Hub: repeats signals; Firewall: filters traffic; AP: provides Wi-Fi; Modem: converts digital to analog for WAN
Why this is correct
This correctly matches each device to its primary role as defined in networking fundamentals. Routers operate at Layer 3 to connect different networks, switches at Layer 2 for local forwarding, hubs at Layer 1 for signal repeating, firewalls for security filtering, access points for wireless connectivity, and modems for WAN signal conversion.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path.
- ✗
Router: forwards within LAN; Switch: routes between networks; Hub: filters traffic; Firewall: repeats signals; AP: converts digital to analog; Modem: provides Wi-Fi
Why it's wrong here
This is incorrect because it swaps the roles of routers and switches, and misassigns functions to hubs, firewalls, APs, and modems. Routers route between networks, not within a LAN; switches forward within a LAN; hubs repeat signals, not filter; firewalls filter traffic, not repeat; APs provide Wi-Fi, not convert signals; modems convert digital to analog, not provide Wi-Fi.
- ✗
Router: filters traffic; Switch: repeats signals; Hub: routes between networks; Firewall: forwards within LAN; AP: converts digital to analog; Modem: provides Wi-Fi
Why it's wrong here
This is incorrect because it assigns firewall functionality to a router, hub function to a switch, routing to a hub, switching to a firewall, and misplaces AP and modem roles. A firewall filters traffic, not a router; a switch forwards within a LAN, not repeat signals; a hub repeats signals, not route; a firewall filters, not forwards; an AP provides Wi-Fi, not convert; a modem converts, not provides Wi-Fi.
- ✗
Router: provides Wi-Fi; Switch: converts digital to analog; Hub: routes between networks; Firewall: forwards within LAN; AP: filters traffic; Modem: repeats signals
Why it's wrong here
This is incorrect because it assigns wireless functionality to a router, modem function to a switch, routing to a hub, switching to a firewall, firewall function to an AP, and repeating to a modem. Routers do not provide Wi-Fi (APs do); switches do not convert signals (modems do); hubs do not route; firewalls do not forward within a LAN; APs do not filter traffic (firewalls do); modems do not repeat signals (hubs do).
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.
✓Router: routes between networks; Switch: forwards within LAN; Hub: repeats signals; Firewall: filters traffic; AP: provides Wi-Fi; Modem: converts digital to analog for WANCorrect answer▾
Why this is correct
This correctly matches each device to its primary role as defined in networking fundamentals. Routers operate at Layer 3 to connect different networks, switches at Layer 2 for local forwarding, hubs at Layer 1 for signal repeating, firewalls for security filtering, access points for wireless connectivity, and modems for WAN signal conversion.
✗Router: forwards within LAN; Switch: routes between networks; Hub: filters traffic; Firewall: repeats signals; AP: converts digital to analog; Modem: provides Wi-FiWrong answer — click to see why▾
Why this is wrong here
The specific factual error is confusing Layer 2 and Layer 3 device functions and misattributing modem and AP roles.
Why candidates choose this
Candidates might confuse routers and switches because both forward traffic, but they operate at different layers and have different scopes.
✗Router: filters traffic; Switch: repeats signals; Hub: routes between networks; Firewall: forwards within LAN; AP: converts digital to analog; Modem: provides Wi-FiWrong answer — click to see why▾
Why this is wrong here
The specific factual error is mixing up the fundamental roles of each device, especially confusing hubs and switches.
Why candidates choose this
Candidates may think hubs and switches are similar, but hubs are Layer 1 repeaters while switches are Layer 2 forwarders.
✗Router: provides Wi-Fi; Switch: converts digital to analog; Hub: routes between networks; Firewall: forwards within LAN; AP: filters traffic; Modem: repeats signalsWrong answer — click to see why▾
Why this is wrong here
The specific factual error is completely reversing the roles of most devices, indicating a fundamental misunderstanding of networking hardware.
Why candidates choose this
Candidates might think a router includes Wi-Fi (common in home routers) but the primary role is routing; the AP function is separate.
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
Be careful not to confuse the functions of routers and switches, as both forward traffic but at different layers. Also, remember that a home 'router' often includes a switch, AP, and modem, but the primary role of a router is routing between networks.
Detailed technical explanation
How to think about this question
A router is a Layer 3 device that connects multiple networks by forwarding packets based on IP routing tables. It uses routing protocols such as OSPF or EIGRP to learn and select the best path for traffic between different IP subnets. Routers perform packet forwarding decisions using destination IP addresses and can implement NAT and ACLs to control traffic flow. Switches operate primarily at Layer 2, forwarding Ethernet frames within a local area network (LAN) based on MAC addresses. They build MAC address tables by learning source addresses from incoming frames and use these tables to efficiently forward frames only to the appropriate ports. Switches also support VLANs to segment traffic logically within the LAN and use Spanning Tree Protocol (STP) to prevent loops. Firewalls enforce security policies by inspecting traffic and permitting or denying it based on rules that can include IP addresses, ports, and protocols. They can operate at multiple layers, including Layer 3 and Layer 7, to provide granular control. Access points extend wired networks wirelessly by bridging wireless clients to the wired LAN, supporting standards like 802.11ac or 802.11ax, and managing wireless security protocols such as WPA3. Understanding these roles helps avoid confusion in exam scenarios where device functions overlap but remain distinct in Cisco network design.
KKey Concepts to Remember
- A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path.
- A switch forwards Ethernet frames within a LAN by learning MAC addresses and using a MAC address table to direct traffic efficiently.
- A firewall applies security policies to permit or deny traffic based on rules that inspect IP addresses, ports, and protocols.
- An access point provides wireless connectivity by bridging wireless clients to the wired LAN and managing wireless security protocols.
- Routing decisions in Cisco devices rely on administrative distance and metrics to select the best path between networks.
- Switches use VLANs to segment LAN traffic logically and Spanning Tree Protocol to prevent Layer 2 loops.
- Firewalls can operate at multiple OSI layers to enforce granular traffic filtering beyond simple packet forwarding.
- Access points support IEEE 802.11 standards and handle wireless client authentication and encryption to secure wireless access.
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
A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-301 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Review a router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path., then practise related 200-301 questions on the same topic to reinforce the concept.
- →
Network Infrastructure and Connectivity — study guide chapter
Learn the concepts, then practise the questions
- →
Network Infrastructure and Connectivity practice questions
Targeted practice on this topic area only
- →
All 200-301 questions
1,819 questions across all exam domains
- →
CCNA 200-301 v2 study guide
Full concept coverage aligned to exam objectives
- →
200-301 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Infrastructure and Connectivity practice questions
Practise 200-301 questions linked to Network Infrastructure and Connectivity.
Switching and Network Access practice questions
Practise 200-301 questions linked to Switching and Network Access.
IP Routing practice questions
Practise 200-301 questions linked to IP Routing.
Network Services and Security practice questions
Practise 200-301 questions linked to Network Services and Security.
AI and Network Operations practice questions
Practise 200-301 questions linked to AI and Network Operations.
CCNA subnetting practice questions
Practise IPv4 subnetting, CIDR, masks, host ranges and subnet selection.
CCNA OSPF practice questions
Practise OSPF neighbours, router IDs, metrics, areas and routing-table interpretation.
CCNA VLAN practice questions
Practise VLANs, access ports, trunks, allowed VLANs and switching scenarios.
CCNA STP practice questions
Practise spanning tree, root bridge election, port roles and STP troubleshooting.
CCNA EtherChannel practice questions
Practise LACP, PAgP, port-channel behaviour and bundle requirements.
CCNA ACL practice questions
Practise standard and extended ACLs, permit/deny logic and traffic filtering.
CCNA NAT practice questions
Practise static NAT, dynamic NAT, PAT and inside/outside address translation.
Practice this exam
Start a free 200-301 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 200-301 question test?
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path..
What is the correct answer to this question?
The correct answer is: Router: routes between networks; Switch: forwards within LAN; Hub: repeats signals; Firewall: filters traffic; AP: provides Wi-Fi; Modem: converts digital to analog for WAN — Router routes between networks; switch forwards within LAN; hub repeats signals; firewall filters traffic; AP provides Wi-Fi; modem converts digital to analog for WAN.
What should I do if I get this 200-301 question wrong?
Review a router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path., 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: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
A router forwards traffic between different IP networks by using routing protocols and routing tables to determine the best path.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 200-301 practice questions
- A switchport connected to another switch should carry multiple VLANs, but it was manually configured as an access port.…
- What problem is HSRP designed to solve?
- Which TWO statements correctly describe the causes or implications of CRC errors, runts, giants, or output errors as see…
- You are connected to R1. Configure IPv4 and IPv6 addressing on R1's interfaces and verify reachability to R2. The curren…
- Which TWO statements accurately describe how AI/ML concepts are applied to network operations in modern enterprise netwo…
- Which TWO switch port configurations are required when connecting a Cisco IP phone and a desktop PC to a single access p…
Last reviewed: Apr 12, 2026
This 200-301 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-301 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.