Cisco CCNA 200-301 Questions & Answers

• Question 161:

  Refer to the exhibit.

  

  Two new switches are being installed. The remote monitoring team uses the support network to monitor both switches. Which configuration is the next step to establish a Layer 2 connection between the two PCs?

  A. SwitchA(config)#interface GigabitEthernet0/1 SwitchA(config-if)#switchport access vlan 500

  SwitchB(config)#interface GigabitEthernet0/1

  SwitchB(config-if)#switchport access vlan 500

  B. SwitchA(config)#interface GigabitEthernet0/1 SwitchA(config-if)#switchport mode trunk

  SwitchB(config)#interface GigabitEthernet0/1

  SwitchB(config-if)#switchport mode trunk

  C. SwitchA(config)#interface GigabitEthernet0/0 SwitchA(config-if)#switchport trunk allowed vlan 500, 550

  SwitchB(config)#interface GigabitEthernet0/0

  SwitchB(config-if)#switchport trunk allowed vlan 500, 550

  D. SwitchA(config)#interface GigabitEthernet0/0 SwitchA(config-if)#spanning-tree portfast SwitchA(config-if)#spanning-tree bpduguard enable

  SwitchB(config)#interface GigabitEthernet0/0

  SwitchB(config-if)#spanning-tree portfast

  SwitchB(config-if)#spanning-tree bpduguard enable

  Correct Answer: A

  L2 connectivity done : vlans allowed on trunk 1-1005. The next step is to configure the access

• Question 162:

  What must a network administrator consider when deciding whether to configure a new wireless network with APs in autonomous mode or APs running in cloud-based mode?

  A. Autonomous mode APs are less dependent on an underlay but more complex to maintain than APs in cloud-based mode.

  B. Cloud-based mode APs relay on underlays and are more complex to maintain than APs in autonomous mode.

  C. Cloud-based mode APs are easy to deploy but harder to automate than APs in autonomous mode.

  D. Autonomous mode APs are easy to deploy and automate than APs in cloud-based mode.

  Correct Answer: A

• Question 163:

  Which state is bypassed in Rapid PVST+ when PortFast is enabled on a port?

  A. blocking

  B. forwarding

  C. learning

  D. discarding

  Correct Answer: C

• Question 164:

  What happens when a switch receives a frame with a destination MAC address that recently aged out?

  A. The switch floods the frame to all ports in all VLANs except the port that received the frame.

  B. The switch floods the frame to all ports in the VLAN except the port that received the frame.

  C. The switch references the MAC address aging table for historical addresses on the port that received the frame.

  D. The switch drops the frame and learns the destination MAC address again from the port that received the frame.

  Correct Answer: B

• Question 165:

  What is a function of store-and forward switching?

  A. It reduces latency by eliminating error checking within the frame

  B. It produces an effective level of error-free network traffic using CRCs.

  C. It buffers frames and forwards regardless of errors within the frames.

  D. It forwards a frame by checking only the destination MAC address

  Correct Answer: B

• Question 166:

  Refer to the exhibit.

  

  Switch AccSw1 has just been added to the network along with PC2. All VLANs have been implemented on AccSw2.

  How must the ports on AccSw2 be configured to establish Layer 2 connectivity between PC1 and PC2?

  A. interface GigabitEthernet1/2 switchport mode access switchport access vlan 2

  !

  interface GigabitEthernet1/24

  switchport mode trunk

  B. interface GigabitEthernet1/1 switchport mode access switchport access vlan 11

  !

  interface GigabitEthernet1/24

  switchport mode trunk

  C. interface GigabitEthernet1/24 switchport mode trunk switchport trunk allowed vlan 11, 12

  !

  interface GigabitEthernet1/1

  switchport access vlan 11

  D. interface GigabitEthernet1/2 switchport mode access switchport access vlan 12

  !

  interface GigabitEthernet1/24

  switchport mode trunk

  switchport trunk allowed vlan 11, 12

  Correct Answer: B

  As you may have learnt already when you apply the "switchport mode trunk" on an interface it allows all VLANs by default. So by using this command in option B all VLANs 1 - 4094 are allowed over the trunk.

  For security reasons, during our network design we tend to remove all vlans and only allow the vlans we desire.

  If we apply the command in option C "switchport trunk allowed VLAN 11, 12" it would delete all vlans and only allow VLANs 11 and 12. This means that all other devices or departments who are dependent on this trunk will be cut-off.

  One of the biggest blunders sometimes made by beginners is to delete an entire VLAN by overwriting it. Always remember to use the "add" command when adding new VLANs to a trunk already configured for other VLANs.

• Question 167:

  Which command entered on a switch configured with Rapid PVST+ listens and learns for a specific time period?

  A. switch(config)#spanning-tree vlan 1 priority 4096

  B. switch(config)#spanning-tree vlan 1 hello-time 10

  C. switch(config)#spanning-tree vlan 1 max-age 6

  D. switch(config)#spanning-tree vlan 1 forward-time 20

  Correct Answer: D

• Question 168:

  Refer to the exhibit.

  

  Which configuration for RTR-1 deniess SSH access from PC-1 to any RTR-1 interface and allows all other traffic?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

• Question 169:

  Refer to the exhibit.

  

  The EtherChannel is configured with a speed of 1000 and duplex as full on both ends of channel group 1. What is the next step to configure the channel on switch A to respond to but not initiate LACP communication?

  A. interface range gigabitethernet0/0/0-15 channel-group 1 mode on

  B. interface range gigabitethernet0/0/0-15 channel-group 1 mode desirable

  C. interface port-channel 1 channel-group 1 mode auto

  D. interface port-channel 1 channel-group 1 mode passive

  Correct Answer: D

  This questions say that "SW A RESPOND, BUT NOT START LACP COMMUNICATION". Ask that "WHICH LACP MODE DOESN`T START COMMUNICATION?"

  LACP modes -> Active/Passive.

  Active -> Start Communication

  Passive -> Doesn`t start Communication.

• Question 170:

  What are two reasons a switch experiences frame flooding? (Choose two.)

  A. A defective patch cable is connected to the switch port

  B. Topology changes are occurring within spanning-tree

  C. An aged MAC (able entry is causing excessive updates

  D. Port-security is configured globally

  E. The forwarding table has overflowed

  Correct Answer: AB