200-301 Free Practice Test

- (Topic 4)
What is the role of the root port in a switched network?

1. A. It replaces the designated port when the designated port fails
2. B. It is the best path to the root from a nonroot switch.
3. C. It replaces the designated port when the root port fails.
4. D. It is administratively disabled until a failover occurs.

Correct Answer: B
The root port is the port on a nonroot switch that has the lowest cost to reach the root bridge in a switched network. The root bridge is the switch that is elected as the central point of the network by the spanning tree protocol (STP). The root port is responsible for forwarding traffic to the root bridge, and it is always in a forwarding state. The cost of a port is determined by the speed and bandwidth of the link, and the lower the cost, the better the path. If there are multiple paths to the root bridge with the same cost, the switch will choose the one with the lowest bridge ID as the tiebreaker. The root port does not replace or replace any designated port, which is the port that forwards traffic on a network segment. The root port is also not administratively disabled or enabled, but it is dynamically selected by STP1234.
References:
✑ 1: Solved: STP: Root port vs. designated port - Cisco Community
✑ 2: Difference between Root Port and Designated Port - GeeksforGeeks
✑ 3: What is a Root Port - Snabay Networking
✑ 4: What is a Root Port - omnisecu.com

- (Topic 3)
What is an expected outcome when network management automation is deployed?

1. A. A distributed management plane must be used.
2. B. Software upgrades are performed from a central controller
3. C. Complexity increases when new device configurations are added
4. D. Custom applications are needed to configure network devices

Correct Answer: B

- (Topic 4)
Refer the exhibit.

What is the cause of poor performance on router R19?

1. A. excessive collisions
2. B. speed and duplex mismatch
3. C. port oversubscription
4. D. excessive CRC errors

Correct Answer: A

- (Topic 2)
What is a characteristic of private IPv4 addressing?

1. A. traverse the Internet when an outbound ACL is applied
2. B. issued by IANA in conjunction with an autonomous system number
3. C. composed of up to 65.536 available addresses
4. D. used without tracking or registration

Correct Answer: D

- (Topic 4)
Refer to the exhibit.

What are the two steps an engineer must take to provide the highest encryption and authentication using domain credentials from LDAP?

1. A. Select PSK under Authentication Key Management
2. B. Select WPA+WPA2 on Layer 2 Security
3. C. Select Static-WEP + 802.1X on Layer 2 Security
4. D. Select WPA Policy with TKIP Encryption
5. E. Select 802.1X from under Authentication Key Management

Correct Answer: BE