CCNA Ch 2 : Basic Switching Concepts and Configuration

Question 1

Which type of cable does a network administrator need to connect a PC to a switch to recover it after the Cisco IOS software fails to load?

Answer 1

a console cable

Question 2

Which two [2] basic functions are performed by network security tools?

Answer 2

1. Revealing the type of information an attacker is able to gather from monitoring network traffic
2. simulating attacks against the production network to determine any existing vulnerabilities

Question 3

While troubleshooting a connectivity problem, a network administrator notices that a switch port status LED is alternating between green and amber. What could this LED indicate?

Answer 3

The port is experiencing errors

Question 4

The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet connections. How should the network administrator change the displayed configuration to satisfy the requirement?

Answer 4

Modify the transport input command.

Question 5

Which three statements are true about using full-duplex Fast Ethernet?

Answer 5

1. Performance is improved with bidirectional data flow.
2. Full-duplex Fast Ethernet offers 100 percent efficiency in both directions.
3. Performance is improved because the collision detect function is disabled on the device

Question 6

In which type of attack does a malicious node request all available IP addresses in the address pool of a DHCP server in order to prevent legitimate hosts from obtaining network access?​

Answer 6

DHCP starvation

Question 7

Which protocol or service sends broadcasts containing the Cisco IOS software version of the sending device, and the packets of which can be captured by malicious hosts on the network?

Answer 7

CDP

Question 8

Which two [2] statements are true regarding switch port security?

Answer 8

1. Dynamically learned secure MAC addresses are lost when the switch reboots.
2. If fewer than the maximum number of MAC addresses for a port are configured statically, dynamically learned addresses are added to CAM until the maximum number is reached.

Question 9

The network administrator enters the following commands on a Cisco switch:
Switch(config)# interface vlan1
Switch(config-if)# ip address 192.168.1.2 255.255.x
Switch(config-if)# no shutdown

Answer 9

Users on the 192.168.1.0/24 subnet are able to ping the switch at IP address 192.168.1.2.

Question 10

Which switch configuration would be most appropriate for port Fa0/2 if the network administrator has the following goals?
No one is allowed to disconnect the IP phone or the PC and connect some other wired device.
If a different device is connected, port Fa0/2 is shut down.
The switch should automatically detect the MAC address of the IP phone and the PC and add those addresses to the running configuration.

Answer 10

SWA(config-if)# switchport port-security
SWA(config-if)# switchport port-security maximum2
SWA(config-if)# switchport port-security mac-address sticky

Question 11

Refer to the exhibit. Which event will take place if there is a port security violation on switch S1 interface Fa0/1?

Answer 11

Packets with unknown source addresses will be dropped.

Question 12

Which method would mitigate a MAC address flooding attack?

Answer 12

configuring port security

Question 13

What media issue might exist on the link connected to Fa0/1 based on the show interface command?

Answer 13

There could be too much electrical interference and noise on the link

Question 14

_____ communication allows both ends of a connection to transmit and receive data simultaneously.

Answer 14

Full-Duplex

Question 15

Which interface is the default location that would contain the IP address used to manage a 24-port Ethernet switch?

Answer 15

Vlan 1

Question 16

Which action will bring an error-disabled switch port back to an operational state?

Answer 16

Issue the shutdown and then no shutdown interface commands.

Question 17

What can be determined about port security from the information that is shown?

Answer 17

The port violation mode is the default for any port that has port security enabled.

Question 18

What are the six [6] steps for a a switch boot sequence

Answer 18

1. Execute post
2. load the boot loader from ROM
3. CPU registers initialisation
4. Flash File initialisation
5. Load IOS
6. Transfer Switch Control to IOS

Question 19

When port security is enabled, a switch port uses the default violation mode of _____ until specifically configured to use a different violation mode.

Answer 19

Shutdown

Question 20

Which S1 switch port interface or interfaces should be configured with the ip dhcp snooping trust command if best practices are implemented?

Answer 20

only the G0/1 and G0/24 ports

Question 21

What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?

Answer 21

automatically detects copper cable type

Question 22

Which command displays information about the auto-MDIX setting for a specific interface?​

Answer 22

show controllers

Question 23

A production switch is reloaded and finishes with a Switch> prompt. What two facts can be determined? Choose two [2]

Answer 23

1. A full version of the Cisco IOS was located and loaded.

2. POST occurred normally.