Test 1 - CCNA 2

Which tasks can be accomplished by using the command history feature? (Choose two.)

• Set the command history buffer size.

• Recall previously entered commands.

• View a list of commands entered in a previous session.

• Recall up to 15 command lines by default.

• Save command lines in a log file for future reference.

Answer explanation

Explanation: The history command allows you to view and reuse previously entered commands stored in the buffer. It is also used to manage the of the buffer.

Which statement describes the system LED operation on Cisco Catalyst switches?

• If the LED is amber, the system is not powered on.

• If the LED is blinking amber, the switch is performing POST.

• If the LED is blinking green, the system is operating normally.

• If the LED is amber, the system is receiving power but it is not functioning properly.

Answer explanation

Explanation: The system LED shows whether the system is receiving power and is functioning properly. If the LED is off, the system is not powered on. If the LED is green, the system is operating normally. If the LED is amber, the system is receiving power but is not functioning properly.

What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature?

• rollover

• crossover

• straight-through

• coaxial

Answer explanation

Explanation: A straight-through cable can be used to connect a computer or a router to a switch. A rollover cable can be used to access a router or switch console line. A coaxial cable is not used any longer in Ethernet networks, but can be found in video connections. A crossover cable can be used to connect a switch to a switch, a computer to a computer, and a router to a router.

What advantage does SSH offer over Telnet?

• connection-oriented services

• more connection lines

• username and password authentication

• encryption

Answer explanation

Explanation: Both Telnet and SSH are used to remotely connect to a network device for management tasks. However, Telnet uses plaintext communications, whereas SSH provides security for remote connections by providing encryption of all transmitted data between devices.

A network administrator has configured ​VLAN 99 as the management VLAN and has configured it with an IP address and subnet mask. The administrator issues the show interface vlan 99 command and notices that the line protocol is down. Which action can change the state of the line protocol to up?

• Configure a transport input method on the vty lines.

• Connect a host to an interface associated with VLAN 99.

• Remove all access ports from VLAN 99.

• Configure a default gateway.

Answer explanation

Explanation: Once an SVI is configured with an IP address and subnet mask, it can be used for remote management. An SVI interface will be active when the SVI VLAN has an active port associated with it.

Which prompt is displayed when a network administrator successfully accesses the boot loader on a switch to recover from a system crash?

Answer explanation

Explanation: The boot loader provides access into the switch if the operating system cannot be used because of missing or damaged system files. After some steps have been completed, the boot loader can be accessed through a console connection, through the switch: prompt.

Which router bootup sequence is correct?​

• 1 – perform the POST and load the bootstrap program
  2 – locate and load the Cisco IOS software
  3 – locate and load the startup configuration file or enter setup mode

• 1 – perform the POST and load the startup configuration file
  2 – locate and load the bootstrap program
  3 – locate and load the Cisco IOS software

• 1 – perform the POST and load the bootstrap program
  2 – locate and load the startup configuration file or enter setup mode
  3 – locate and load the Cisco IOS software

• 1 – perform the POST and load the Cisco IOS software
  2 – locate and load the startup configuration file or enter setup mode
  3 – locate and load the bootstrap program

Answer explanation

Explanation: When a router is powered on, it undergoes a POST to verify that the hardware is functional, after which it proceeds by locating and loading the Cisco IOS software and then loading the startup configuration file if one is present.

What is the first action in the boot sequence when a switch is powered on?

• low-level CPU initialization

• load boot loader software

• load the default Cisco IOS software

• load a power-on self-test program

Answer explanation

Explanation: The first action to take place when a switch is powered on is the POST or power-on self-test. POST performs tests on the CPU, memory, and flash in preparation for loading the boot loader.

Which command will provide information about the status of all interfaces including the number of giants, runts, and collisions on the interface?

Answer explanation

Explanation: The show interfaces command is the most comprehensive in providing information about interfaces. The show ip interface brief command does not provide information on giants, runts, or collisions. The show history command provides a history of the commands that are used. The show running-config command will show configuration information, but not status information.

What is a function of the switch boot loader?

• To control how much RAM is available to the switch during the boot process

• To provide an environment to operate in when the switch operating system cannot be found

• To provide security for the vulnerable state when the switch is booting

• To speed up the boot process

Answer explanation

Explanation: The switch boot loader environment is presented when the switch cannot locate a valid operating system. The boot loader environment provides a few basic commands that allow a network administrator to reload the operating system or provide an alternate location of the operating system.