SkillTestPro | Cisco CCNA Practice Test 10

Cisco CCNA Practice Test 10

Cisco CCNA Exam Practice Test

1 / 20

What prevents OSPF from forming adjacencies between routers in different subnets?

Different OSPF process IDs

Different area IDs

Mismatched subnet masks

Different Hello Timers

Different router priorities

2 / 20

What happens if an STP port is in the Blocking state?

It forwards frames

It learns MAC addresses

It generates spanning-tree advertisements

It listens for BPDU messages

It acts as a backup link

3 / 20

What does show ip route display?

The switch MAC address table

The device’s active routing table

Active TCP/UDP sessions

The configured access control lists

The VLAN database

4 / 20

A router is running OSPF, and an administrator wants to prevent updates from being sent out of a specific interface. What should be done?

Set the interface as passive

Increase the OSPF cost

Disable link-state advertisements

Assign the interface to Area 0

Reduce the interface MTU

5 / 20

What is the function of show cdp neighbors?

Lists all devices in the OSPF database

Shows active NAT translations

Displays MAC addresses of all VLAN members

Lists all hosts in a network

Displays directly connected Cisco devices

6 / 20

What is the default administrative distance for a static route?

110

120

7 / 20

What does the command switchport mode trunk do?

Forces the port to operate in access mode

nables dynamic VLAN assignment

Allows multiple VLANs to pass through the interface

Enables DHCP on the switch

Blocks all untagged frames

8 / 20

What technique does IPv6 use to achieve address auto-configuration?

NAT

SLAAC

CIDR

SNMP

RIPv6

9 / 20

What is the purpose of ip helper-address on a router?

Creates a static route

Converts a switch into a router

Implements Port Security

Forwards DHCP requests to a remote DHCP server

Enables EIGRP neighbor discovery

10 / 20

What OSPF feature ensures that a designated router (DR) and backup designated router (BDR) are elected in multi-access networks?

Hello Timer

Priority Value

Split Horizon

Poison Reverse

Virtual Link

11 / 20

What is a key function of HSRP (Hot Standby Router Protocol)?

Automatically assigns IP addresses to clients

Encrypts all network traffic between routers

Prevents loops in a switched network

Enables VLAN tagging across multiple switches

Provides Layer 3 redundancy by allowing routers to share a virtual IP

12 / 20

What command displays the contents of the MAC address table on a Cisco switch?

show mac-table

show interfaces mac

show arp

show mac address-table

show spanning-tree mac

13 / 20

Which spanning-tree enhancement prevents a newly powered-on switch from becoming the root?

Root Guard

BPDU Guard

Loop Guard

UDLD

EtherChannel

14 / 20

A network engineer needs to configure a switch to prevent unauthorized devices from connecting to an unused port. What is the best method?

Enable DHCP Snooping

Enable Port Security

Enable BPDU Filtering

Configure VLAN Hopping Prevention

Set the port to half-duplex

15 / 20

Which protocol enables routers to share information about network reachability using hop count as the metric?

EIGRP

OSPF

BGP

RIP

IS-IS

16 / 20

In an OSPF network, what happens when two routers have the same router ID?

The router with the lower IP address wins the DR election

The OSPF adjacency fails

Both routers become Designated Routers (DRs)

The network enters a split-horizon state

The routers exchange LSAs but will not forward packets

17 / 20

What will happen if a router does not have a route for a destination network?

It forwards the packet to the default gateway

It attempts to ARP for the next-hop address

It drops the packet and sends an ICMP Destination Unreachable message

It assigns the packet to the null interface

It forwards the packet to all directly connected interfaces

18 / 20

What is the primary reason for using BPDU Guard on an access port?

To prioritize voice traffic

To prevent VLAN hopping

To enforce static port security

To disable dynamic trunking protocol

To prevent rogue switches from affecting the spanning-tree topology

19 / 20

A switch has multiple ports configured in an EtherChannel group, but only one link is being used. What is the most likely cause?

Spanning Tree Protocol has disabled the extra links

Load balancing algorithm is set to a single port

The trunk mode is set to dynamic auto

The EtherChannel is configured in passive mode

The switch does not support LACP

20 / 20

A router receives an IPv6 packet with a destination address of FF02::2. What happens next?

The router forwards it to all IPv6-enabled hosts

The router sends it to the IPv6 default gateway

The router processes it and forwards it to the next-hop router

The router processes it because it's an all-routers multicast address

The router drops it because multicast is not allowed

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