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Cisco 200-301 Bundle

Exam Code: 200-301

Exam Name Cisco Certified Network Associate (CCNA)

Certification Provider: Cisco

Corresponding Certification: CCNA

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Cisco 200-301 Practice Test 11

Question 100

A Linux administrator needs to see the host routing table and determine which default gateway carries traffic outside the subnet. Which command is suited to that requirement?

  1. `show spanning-tree` on the host shell.
  2. `ip route show` on the Linux host.
  3. `dig example.com` alone.
  4. `ip neigh` alone.

Explanation

Correct Answer

B:

The Linux `ip route` command shows the kernel IPv4 routing table, including connected prefixes and the default route with the gateway and interface. This is the local forwarding decision context needed for remote connectivity. Displaying DNS records or MAC neighbors alone does not identify the selected IP default path.

Incorrect Answers

A:

Spanning Tree is a switching-control protocol, not a Linux host command for its IP route table. The gateway is a Layer 3 forwarding parameter.

C:

A DNS query can verify name resolution, but does not show the operating system’s installed default gateway. Reachability can fail even if DNS returns a valid IP.

D:

`ip neigh` displays neighbor address resolution entries such as local IP-to-MAC mappings. It does not give the complete route table or the default route selection.

Question 101

A Mac laptop can reach other devices on its own subnet by IP but not a remote network. The network team asks for the local IPv4 default router used by the laptop. What should be checked?

  1. The host default route and next-hop gateway in its network configuration.
  2. The local Ethernet MAC address learned by the access switch only.
  3. The WLAN SSID broadcast interval, regardless of whether wired access works.
  4. The laptop’s DNS suffix search list alone.

Explanation

Correct Answer

A:

A host sends packets for off-subnet destinations to its configured default gateway, usually the local router interface. Inspecting the route table or the network service’s router setting identifies the actual next hop. Local subnet success alone does not prove a usable default route; a gateway misconfiguration can isolate remote networks.

Incorrect Answers

B:

A learned MAC demonstrates Layer 2 connectivity to the laptop but does not establish its IP default gateway. The remote routing decision requires Layer 3 next-hop configuration.

C:

SSID beacons help wireless discovery but do not identify a host’s IP default route. The failure is specifically off-subnet IP forwarding after local communication succeeds.

D:

DNS suffixes govern how short names are expanded during resolution, not which router forwards off-subnet packets. The test already uses destination IP addresses, so a route check is more direct.

Question 102

A Windows computer resolves local DNS names but cannot reach anything beyond its subnet. The help desk needs to inspect its installed IPv4 default gateway, subnet mask, DHCP server and DNS addresses. Which local diagnostic is appropriate?

  1. Run `show ip route` in the Windows Command Prompt.
  2. Read the Ethernet switch MAC address table.
  3. Run only `nslookup` against the intranet hostname.
  4. Run `ipconfig /all` and inspect the active network adapter.

Explanation

Correct Answer

D:

On Windows, `ipconfig /all` displays detailed adapter information including the assigned address, mask, default gateway, DHCP details and DNS servers. These parameters show whether the host has the correct forwarding next hop and resolver configuration. Ping alone tests individual paths but does not list all the installed adapter parameters.

Incorrect Answers

A:

`show ip route` is Cisco IOS syntax and is not the Windows adapter inspection command. `route print` can show routes but `ipconfig /all` directly provides the requested address and DHCP/DNS fields.

B:

A switch forwarding table maps MACs to access ports rather than revealing all host IPv4 configuration fields. It may help locate the computer but not show its installed DNS or gateway.

C:

Name lookup can show DNS resolution and selected resolver behavior, but it does not display the entire local IP/mask/gateway configuration. The complaint specifically requires checking the gateway and DHCP lease.

Question 103

A Windows workstation displays an address 169.254.23.9/16 and cannot reach the enterprise IPv4 gateway. DHCP discovery was expected. What condition should be investigated first?

  1. Failure to obtain a DHCP lease, resulting in a link-local automatic private IPv4 address.
  2. A successful DHCP lease within the enterprise private subnet.
  3. A DNS-only failure while DHCP addressing is confirmed healthy.
  4. An OSPF router-id collision on the client machine.

Explanation

Correct Answer

A:

Windows can self-assign a 169.254/16 APIPA address when it does not obtain a usable DHCP lease. Such an address generally cannot reach the organization’s routed production subnet through the expected gateway. Check VLAN assignment, DHCP server, relay path and lease process rather than treating the link-local address as a valid enterprise gateway assignment.

Incorrect Answers

B:

An automatically selected 169.254 address is the opposite of the expected enterprise lease in this case. Normal DHCP success would supply a scope address, mask and gateway options.

C:

DNS failure affects names after an address is configured. The displayed APIPA address is direct evidence of a client addressing problem, so name resolution is not the first likely cause.

D:

Ordinary Windows workstation DHCP address configuration does not run OSPF as a routing adjacency. A router ID issue would not explain its automatic 169.254 client address.

Question 104

An administrator on a Linux host needs to view its current IPv4 and IPv6 interface addresses and prefix lengths, rather than just DNS or a Windows adapter report. Which diagnostic is appropriate?

  1. Run `show ip interface brief` directly in a normal Linux shell.
  2. Run `arp -a` to read complete IPv6 interface address assignments.
  3. Run `ip address show` and inspect the relevant interface output.
  4. Run `nslookup` and treat its name-to-address answer as the local interface configuration.

Explanation

Correct Answer

C:

The Linux `ip` tool reports configured interface addresses, flags and IPv4/IPv6 prefixes, allowing the engineer to verify whether the host is on the expected subnet. `ip route` complements this by showing default routes if needed. This direct inspection separates local addressing problems from later DNS or application failures.

Incorrect Answers

A:

That command is associated with Cisco IOS network devices, not standard Linux host configuration. Using a router-specific CLI would not inspect the local Linux NIC.

B:

ARP tables list neighbor mappings and do not directly list all configured IPv4/IPv6 interface addresses. IPv6 also uses Neighbor Discovery rather than the traditional IPv4 ARP mechanism.

D:

DNS lookup resolves a name through a resolver; it does not show the host NIC’s assigned addresses and masks. A successful lookup cannot prove that the Linux interface has its expected prefix.

Question 105

Two 2.4-GHz WLANs in the same building interfere with each other despite correct authentication. For conventional 20-MHz channel planning, which design is best in common regulatory environments?

  1. Assign adjacent channels 3 and 4 to separate nearby APs.
  2. Use nonoverlapping 2.4-GHz channels such as 1, 6 and 11 where locally permitted.
  3. Turn off WPA2 encryption to reduce RF overlap.
  4. Change the SSIDs to unique text while leaving interfering channels unchanged.

Explanation

Correct Answer

B:

Overlapping 2.4-GHz channels share much of their spectrum, so adjacent WLANs can interfere even when the SSIDs differ. A common 20-MHz channel plan chooses sufficiently separated channels such as 1, 6 and 11, subject to local regulatory limits. Verify RF measurements and transmit power because physical overlap and client behavior also influence airtime.

Incorrect Answers

A:

Channels 3 and 4 overlap heavily at 2.4 GHz and can worsen adjacent-channel interference. Channel numbers being different does not guarantee nonoverlapping frequencies or independent airtime.

C:

Encryption protects frame confidentiality and authentication; it does not move transmissions to a different RF channel. Disabling security would add exposure without resolving physical interference.

D:

SSID names distinguish logical WLAN identifiers but do not alter the radio channel bandwidth or center frequencies. Different names can still transmit over overlapping spectrum.

Question 106

Two wireless networks use distinct SSID names in the same location, but clients continue failing to connect after selecting the correct corporate name. What conclusion about SSID and security is accurate?

  1. Two WLANs with different SSIDs always use physically separate radio channels.
  2. Changing the IPv4 subnet mask makes an invalid Wi-Fi password acceptable.
  3. The SSID contains a secret key that automatically authenticates every client.
  4. An SSID identifies the WLAN; authentication and encryption settings must also be compatible.

Explanation

Correct Answer

D:

The service set identifier is the human-visible network name a client uses during discovery and association. A matching SSID is not proof that the client has valid credentials or a compatible WPA security profile. Verify the WLAN’s actual authentication method, supported ciphers and client settings separately.

Incorrect Answers

A:

SSID names do not force unique RF channels. Multiple WLANs can be advertised by the same radio or coexist on a shared channel, depending on AP configuration.

B:

IP addressing follows successful radio association and authentication. A network mask cannot repair a WPA credential or cryptographic mismatch.

C:

SSID is a network identifier, not the negotiated cryptographic key or authentication credential. Publishing the name does not establish authorization.

Question 107

Users near two neighboring access points see a single network name and can roam between them using the same company WLAN. What identifies the advertised wireless network rather than an individual AP radio?

  1. The IPv4 DHCP option 3 default-router field.
  2. The SSID configured on the WLAN.
  3. The controller’s administrative hostname only.
  4. The BSSID as the network-wide name shared by every AP.

Explanation

Correct Answer

B:

The Service Set Identifier is the human-readable network name that clients discover when scanning for WLANs. Multiple APs can advertise the same SSID while using distinct BSSIDs for their particular radios. Roaming also depends on compatible authentication and infrastructure policy; matching SSID alone does not establish secure roaming.

Incorrect Answers

A:

DHCP option 3 provides an IP gateway after the client connects; it does not name the WLAN in beacon/probe responses. It belongs to Layer 3 addressing, not wireless discovery.

C:

The WLAN can have an SSID independent of the WLC device name. Users associate to an advertised network identifier, not by resolving the controller’s management hostname.

D:

A BSSID typically identifies a particular basic service set, often tied to an AP radio MAC. It helps distinguish cells but is not the shared network name users select.

Question 108

An engineer needs a WLAN to prevent unauthenticated observers from reading protected client traffic. Which characteristic supplies that confidentiality at the wireless link?

  1. Change 2.4-GHz channel 1 to channel 11 only.
  2. Increase the DHCP lease duration to a week.
  3. Enable SSID broadcast and leave the WLAN open.
  4. Use a supported WLAN encryption and authentication security mode such as WPA2 or WPA3.

Explanation

Correct Answer

D:

WPA2/WPA3 security mechanisms provide authentication and negotiated cryptographic protection for data frames on a wireless network when configured correctly. A visible SSID or frequency band alone does not encrypt frames. Choose a supported deployment mode and key management appropriate to client and enterprise requirements.

Incorrect Answers

A:

Channel changes can reduce radio interference but do not negotiate encryption keys. They cannot stop a passive receiver from decoding unprotected link traffic.

B:

A DHCP lease controls how long a client holds an IP configuration, not whether Wi-Fi frames are encrypted. Network-layer addressing and link confidentiality are distinct.

C:

Advertising the network name helps client discovery but does not encrypt the 802.11 payload. An open WLAN lacks the specified link confidentiality.

Question 109

A WLAN site survey shows the 5-GHz band provides more available nonoverlapping channels than congested 2.4 GHz for supported clients. Which observation best explains a possible design advantage?

  1. 5-GHz networks do not need authentication or encryption.
  2. Using appropriate 5-GHz channels can reduce co-channel contention in a dense deployment.
  3. The 5-GHz band has exactly three nonoverlapping 20-MHz channels worldwide.
  4. Every 5-GHz radio always propagates farther through walls than 2.4 GHz.

Explanation

Correct Answer

B:

Compared with crowded 2.4 GHz, the 5-GHz band generally offers more channel choices for separating nearby BSSs, though allowed channels and DFS rules depend on region and hardware. Distributing cells across suitable channels can improve spatial reuse. Coverage and wall penetration still require measurement because higher-frequency links may attenuate more.

Incorrect Answers

A:

Band selection does not remove wireless authentication or confidentiality requirements. WPA2/WPA3 controls remain relevant independently of RF spectrum.

C:

Channel availability in 5 GHz is broader and varies with jurisdiction, device support and dynamic frequency selection. The three-channel planning shorthand applies to common 2.4-GHz planning.

D:

5-GHz coverage is not automatically longer; higher frequencies may face greater attenuation for similar conditions. Channel availability and measured propagation, not guaranteed range, drive the stated advantage.

Question 110

A dual-band site survey finds that 5-GHz clients transmit at high rate close to an AP but have poor coverage behind thick concrete walls, while 2.4-GHz clients remain associated farther away. Which RF characteristic best explains this difference?

  1. 5 GHz always has longer wall penetration because it uses more channel numbers.
  2. The IP subnet mask must be enlarged so the 5-GHz radio reaches the far rooms.
  3. Turn off WPA2 because encryption alone determines how deeply radio waves penetrate walls.
  4. Higher-frequency signals may experience greater path loss or material attenuation; validate 5-GHz coverage and AP density.

Explanation

Correct Answer

D:

RF propagation depends on wavelength, materials and transmit/receive characteristics. A 5-GHz cell may offer additional channel choices yet cover fewer obstructed locations than 2.4 GHz under similar conditions. Use a measured survey and appropriate AP placement rather than promising universally superior distance from the higher band.

Incorrect Answers

A:

Channel count is a spectrum-allocation property, not a guarantee of better material penetration. The walls and frequency-dependent attenuation cause the observed difference.

B:

IP prefix length changes Layer 3 addressing and cannot overcome radio path loss through concrete. RF design must address signal strength and interference.

C:

Security encryption protects frames but does not meaningfully alter their RF propagation through building materials. Removing security adds exposure without improving coverage.