CCNA 2 Chapter 2 v5.0 answers

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1. Qué interfaz es la ubicación predeterminada que contendría la dirección IP utilizada para administrar un conmutador Ethernet de 24 puertos?

1. interface connected to the default gateway

2. Fa0/1

3. VLAN 99

4. Fa0/0

5. VLAN 1





2. ¿Qué tres afirmaciones son ciertas acerca del uso de Fast Ethernet full-duplex? (Elija tres.)

1. Se mejora el rendimiento porque la colisión detecta la función se desactiva en el dispositivo

2. Se mejora el rendimiento debido a que el NIC es capaz de detectar colisiones.

3. Fast Ethernet full-duplex ofrece una eficiencia del 100 por ciento en los dos sentidos.

4. Los nodos operan en full-duplex con el flujo de datos unidireccional.

5. El rendimiento mejora con el flujo de datos bidireccional.

6. La latencia se reduce porque el NIC procesa tramas más rápido.



3. ¿Qué impacto tiene el uso del comando de configuración automática mdix tiene en una interfaz Ethernet en un switch?

1. detecta automáticamente la velocidad de interfaz

2. asigna automáticamente la dirección MAC primero detectado a una interfaz

3. detecta automáticamente la configuración dúplex

4. detecta automáticamente el tipo de cable de cobre



4. ¿Qué tipo de cable necesita un administrador de red para conectar un PC a un interruptor para recuperarlo después del software Cisco IOS falla en cargar?

1. un cable coaxial

2. un cable cruzado

3. un cable de consola

4. un cable de conexión directa



 5. Mientras que la solución de un problema de conectividad, un administrador de red se da cuenta de que un LED de estado del puerto del switch es alternando entre el verde y ámbar. Lo que podría indicar este LED?

 1. El puerto tiene un enlace activo con la actividad del tráfico normal.

 2. El puerto es administrativamente abajo.

3. El puerto está experimentando errores.

4. El puerto no tiene ningún vínculo.

5. Un PC está utilizando el cable equivocado para conectar con el puerto.



6. Un interruptor de la producción se vuelve a cargar y acaba con el Switch> pronta. ¿Qué dos hechos se puede determinar? (Elija dos.)

 Se interrumpió el proceso de arranque.

 No hay suficiente memoria RAM o flash en este router.

 Una versión completa del Cisco IOS fue localizado y cargado.

 POSTE ocurrió normalmente.

 El interruptor no pudo localizar el Cisco IOS en flash, por lo que por defecto en ROM



7 ¿Qué comando muestra información sobre la configuración de auto-MDIX para una interfaz específica ??

1. show running-config

2. show controllers

3. show processes

4. show interfaces



8.


Consulte la presentación. ¿Qué tema mediático pudiera existir en el enlace conectado a Fa0 / 1 basado en el comando show interface?

La interfaz puede ser configurada como half-duplex.

Podría haber demasiada interferencia eléctrica y el ruido en el enlace.

Podría haber un problema con una tarjeta de red defectuosa.

 El montaje del cable del host al puerto Fa0 / 1 podría ser demasiado largo.

 El parámetro de ancho de banda en la interfaz podría ser demasiado alta.



 9.
 

 Consulte la presentación. El administrador de red desea configurar Switch1 para permitir conexiones SSH y prohibir las conexiones Telnet. ¿Cómo debe cambiar el administrador de red la configuración que se muestra para satisfacer el requisito?

 1. Utilice SSH versión 1.

 2. Vuelva a configurar la clave RSA.

 3. Configurar SSH en una línea diferente

4. Modificar el orden de entrada de transporte.



 10. ¿Qué protocolo o servicio envía las emisiones que contienen la versión del software Cisco IOS del dispositivo de envío, y los paquetes de los cuales pueden ser capturados por los anfitriones maliciosos en la red?

1. DHCP

2. SSH

3. DNS

4. CDP



11. ¿En qué tipo de ataque hace una petición nodo malicioso todas las direcciones IP disponibles en el conjunto de direcciones de un servidor DHCP con el fin de evitar que los ejércitos legítimos de la obtención de acceso a la red ??

1. DHCP snooping

2. MAC address flooding

3. CAM table overflow

4. DHCP starvation



12. ¿Qué método mitigaría un ataque dirección inundaciones MAC?

1. uso de las ACL para filtrar el tráfico de difusión en el interruptor

2. aumentando la velocidad de puertos de conmutación

3. aumentando el tamaño de la tabla CAM

4. configuración de la seguridad portuaria



13. ¿Qué dos funciones básicas se llevan a cabo por las herramientas de seguridad de red? (Elija dos.)























1. Which interface is the default location that would contain the IP address used to manage a 24-port Ethernet switch?
interface connected to the default gateway
Fa0/1
VLAN 99
Fa0/0
VLAN 1
_______________________________________________________________
2. Which three statements are true about using full-duplex Fast Ethernet? (Choose three.)
Performance is improved because the collision detect function is disabled on the device.
Performance is improved because the NIC is able to detect collisions.
Full-duplex Fast Ethernet offers 100 percent efficiency in both directions.
Nodes operate in full-duplex with unidirectional data flow.
Performance is improved with bidirectional data flow.
Latency is reduced because the NIC processes frames faster.
_______________________________________________________________
3
What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?
automatically detects interface speed
automatically assigns the first detected MAC address to an interface
automatically detects duplex settings
automatically detects copper cable type
_______________________________________________________________
4. 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?
a coaxial cable
a crossover cable
a console cable
a straight-through cable
_______________________________________________________________
5
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?
The port has an active link with normal traffic activity.
The port is administratively down.
The port is experiencing errors.
The port has no link.
A PC is using the wrong cable to connect to the port.
________________________________________________________________
6
A production switch is reloaded and finishes with a Switch> prompt. What two facts can be determined? (Choose two.)
The boot process was interrupted.
There is not enough RAM or flash on this router.
A full version of the Cisco IOS was located and loaded.
POST occurred normally.
The switch did not locate the Cisco IOS in flash, so it defaulted to ROM.
_________________________________________________________________
7
Which command displays information about the auto-MDIX setting for a specific interface??
show running-config
show controllers
show processes
show interfaces
________________________________________________________________
8.

Refer to the exhibit. What media issue might exist on the link connected to Fa0/1 based on the show interface command?
The interface might be configured as half-duplex.
There could be too much electrical interference and noise on the link.
There could be an issue with a faulty NIC.
The cable attaching the host to port Fa0/1 might be too long.
The bandwidth parameter on the interface might be too high.
_________________________________________________________________
9.

Refer to the exhibit. 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?
Use SSH version 1.
Reconfigure the RSA key.
Configure SSH on a different line.
Modify the transport input command.
____________________________________________________________________
10
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?
DHCP
SSH
DNS
CDP
____________________________________________________________________
11
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??
DHCP snooping
MAC address flooding
CAM table overflow
DHCP starvation
_________________________________________________________________
12
Which method would mitigate a MAC address flooding attack?
using ACLs to filter broadcast traffic on the switch?
increasing the speed of switch ports
increasing the size of the CAM table
configuring port security
_____________________________________
13
Which two basic functions are performed by network security tools? (Choose two.)
simulating attacks against the production network to determine any existing vulnerabilities
writing a security policy document for protecting networks
educating employees about social engineering attacks
revealing the type of information an attacker is able to gather from monitoring network traffic
controlling physical access to user devices
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14
Which action will bring an error-disabled switch port back to an operational state?
Issue the switchport mode access command on the interface.
Issue the shutdown and then no shutdown interface commands.
Remove and reconfigure port security on the interface.
Clear the MAC address table on the switch.
__________________________________________________________________
15.

Refer to the exhibit. Which S1 switch port interface or interfaces should be configured with the ip dhcp snooping trust command if best practices are implemented?
only the G0/2, G0/3, and G0/4 ports
only the G0/1 and G0/24 ports
only the G0/1, G0/2, G0/3, and G0/4 ports
only unused ports
only the G0/1 port
_____________________________________
16.

Refer to the exhibit. Port Fa0/2 has already been configured appropriately. The IP phone and PC work properly. 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.
SWA(config-if)# switchport port-security mac-address sticky
SWA(config-if)# switchport port-security maximum 2
SWA(config-if)# switchport port-security
SWA(config-if)# switchport port-security maximum 2
SWA(config-if)# switchport port-security mac-address sticky
SWA(config-if)# switchport port-security violation restrict
SWA(config-if)# switchport port-security
SWA(config-if)# switchport port-security mac-address sticky
SWA(config-if)# switchport port-security
SWA(config-if)# switchport port-security maximum 2
SWA(config-if)# switchport port-security mac-address sticky
_______________________________________________________________
17.

Refer to the exhibit. What can be determined about port security from the information that is shown?
The port has been shut down.
The port has the maximum number of MAC addresses that is supported by a Layer 2 switch port which is configured for port security.
The port violation mode is the default for any port that has port security enabled.
The port has two attached devices.
_______________________________________________________________
18.

Refer to the exhibit. Which event will take place if there is a port security violation on switch S1 interface Fa0/1?
The interface will go into error-disabled state.
Packets with unknown source addresses will be dropped.
A syslog message is logged.
A notification is sent.
_______________________________________________________________
19
The network administrator enters the following commands on a Cisco switch:
Switch(config)# interface vlan1
Switch(config-if)# ip address 192.168.1.2 255.255.255.0
Switch(config-if)# no shutdown
What is the effect of entering these commands?
All devices attached to this switch must be in the 192.168.1.0/24 subnet to communicate.
The address of the default gateway for this LAN is 192.168.1.2/24.
Users on the 192.168.1.0/24 subnet are able to ping the switch at IP address 192.168.1.2.
The switch is able to forward frames to remote networks.
________________________________________
20
Which two statements are true regarding switch port security? (Choose two.)
The three configurable violation modes all require user intervention to re-enable ports.
The three configurable violation modes all log violations via SNMP.
After entering the sticky parameter, only MAC addresses subsequently learned are converted to secure MAC addresses.
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.
Dynamically learned secure MAC addresses are lost when the switch reboots.
_______________________________________________________________
21
Fill in the blank.
Full-duplex communication allows both ends of a connection to transmit and receive data simultaneously.
_______________________________
22
Fill in the blank.
When port security is enabled, a switch port uses the default violation mode of shutdown until specifically configured to use a different violation mode.
________________________________
23

MATCHING
Step 1. Execute POST
Step 2. Load the boot loader from ROM
Step 3. CPU register initilizations
Step 4. flash file system initialization
Step 5. Load the IOS
Step 6. Transfer switch control to the IOS
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24.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Fill in the blank.
Do not use abbreviations.What is the missing command on S1?
ip address 192.168.99.2 255.255.255.0
25.
Fill in the blank.
When port security is enabled, a switch port uses the default violation mode of  until specifically configured to use a different violation mode.
shutdown
If no violation mode is specified when port security is enabled on a switch port, then the security violation mode defaults to shutdown.