Management and QoS CCNA review

A network engineer must create a diagram of a multi-vendor network. Which command must be configured on the Cisco devices so that the topology of the network can be mapped?

• (config)#lldp run

• (config)#cdp run

• (config-if)#cdp enable

• (config)#flow-sampler-map topology

What is a function of TFTP in network operations?

• Transfers a backup configuration file from a server to a switch using a username and password

• Transfers files between file systems on a router

• Transfers a configuration file from a server to a router on a congested link

• Transfers IOS image from a server to a router for firmware upgrades

An engineer configures int G1/0 on the company PE router to connect to an ISP. Neighbor discovery is disabled. Which action is necessary to complete the configuration if the ISP uses third-party network devices?

• Enable LLDP globally

• Disable autonegotiation

• Disable Cisco Discovery Protocol on the interface

• Enable LLDP-MED on the ISP device.

The NTP server 192.168.0.3 command has been configured on R1 to make it an NTP client of R2. Which command must be configured on R2 so that it operates in server-only mode and relies only on its internal clock?

• ntp passive

• ntp server 172.17.0.1

• ntp master 4

• ntp server 192.168.0.2

Which QoS tool is used to optimize voice traffic on a network that is primarily intended for data traffic?

• FIFO

• WFQ

• PQ

• WRED

Which two items must be met before SSH can operate normally on a Cisco switch? (Choose two.)

• The switch must be running a k9 (crypto) IOS image.

• The IP domain-name command must be configured on the switch.

• IP routing must be enabled on the switch.

• A console password must be configured on the switch.

• Telnet must be disabled on the switch.

When deploying syslog, which severity level logs informational messages?

• 0

• 2

• 4

• 6

Answer explanation

Emergency (0) System is unusable

Alert (1) Immediate action is required

Critical (2) Critical conditions that could lead to failure

Error (3) Non-critical errors that need fixing

Warning (4) Potential issues that may lead to errors

Notice (5) Normal but noteworthy events

Informational (6) General system activity logs

Debug (7) Detailed info for troubleshooting

Note that when you choose a level you get all those levels and the ONES ABOVE IT: Choose 4 (get 0-3).

A network administrator must configure SSH for remote access to router R1. The requirement is to use a public and private key pair to encrypt management traffic to and from the connecting client. Which configuration meets the requirements?

• ip domain-name cisco.com

  crypto key generate ec keysize 2048

• ip domain-name cisco.com

  crypto key generate rsa modulus 1024

• ip domain-name cisco.com

  crypto key generate ec keysize 1024

• ip domain-name cisco.com

  crypto key encrypt rsa name myKey

Answer explanation

This is shown on several different sites for 3 of the 4 answers being correct. I believe the RSA one is the correct one because it is the default value for SSH. https://www.digitalocean.com/community/tutorials/ssh-essentials-working-with-ssh-servers-clients-and-keys

How does QoS optimize voice traffic?

• reducing bandwidth usage

• reducing packet loss

• differentiating voice and video traffic

• increasing jitter

MIB​ (a)  

SNMP agent​ (b)  

SNMP manager​ (c)  

SNMP trap ​ (d)  

• collection of variables that can be monitored
• responds to status requests and requests for info
• resides on a NMS
• unsolicited message