CCNA Routing and Switching Essentials Chapter 2

A. POST occurred normally. D. A full version of the Cisco IOS was located and loaded.

A production switch is reloaded and finishes with a Switch> prompt. What two facts can be determined? (Choose two.) A. POST occurred normally. B. The switch did not locate the Cisco IOS in flash, so it defaulted to ROM. C. There is not enough RAM or flash on this router. D. A full version of the Cisco IOS was located and loaded. E. The boot process was interrupted.

B. DHCP starvation

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?​ A. MAC address flooding B. DHCP starvation C. DHCP snooping D. CAM table overflow

1. execute POST 2. load the boot loader from ROM 3. CPU register initializations 4. flash file system initialization 5. load the IOS 6. transfer switch control to the IOS

Match the step to each switch boot sequence description

ip address 192.168.99.2 255.255.255.0

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?

C. SWA(config-if)# switchport port-security SWA(config-if)# switchport port-security maximum 2 SWA(config-if)# switchport port-security mac-address sticky

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. A. SWA(config-if)# switchport port-security SWA(config-if)# switchport port-security mac-address sticky B. SWA(config-if)# switchport port-security mac-address sticky SWA(config-if)# switchport port-security maximum 2 C. SWA(config-if)# switchport port-security SWA(config-if)# switchport port-security maximum 2 SWA(config-if)# switchport port-security mac-address sticky D. 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

C. Modify the transport input command.

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? A. Use SSH version 1. B. Configure SSH on a different line. C. Modify the transport input command. D. Reconfigure the RSA key.

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

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

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

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

D. only the G0/1 and G0/24 ports

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? A. only the G0/1 port B. only unused ports C. only the G0/1, G0/2, G0/3, and G0/4 ports D. only the G0/1 and G0/24 ports E. only the G0/2, G0/3, and G0/4 ports

B. Packets with unknown source addresses will be dropped.

Refer to the exhibit. Which event will take place if there is a port security violation on switch S1 interface Fa0/1? A. The interface will go into error-disabled state. B. Packets with unknown source addresses will be dropped. C. A notification is sent. D. A syslog message is logged.

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

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? A. All devices attached to this switch must be in the 192.168.1.0/24 subnet to communicate. B. The switch is able to forward frames to remote networks. C. Users on the 192.168.1.0/24 subnet are able to ping the switch at IP address 192.168.1.2. D. The address of the default gateway for this LAN is 192.168.1.2/24.

D. automatically detects copper cable type

What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch? A. automatically detects interface speed B. automatically detects duplex settings C. automatically assigns the first detected MAC address to an interface D. automatically detects copper cable type

shutdown

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

D. Issue the shutdown and then no shutdown interface commands.

Which action will bring an error-disabled switch port back to an operational state? A. Remove and reconfigure port security on the interface. B. Issue the switchport mode access command on the interface. C. Clear the MAC address table on the switch. D. Issue the shutdown and then no shutdown interface commands.

A. show controllers

Which command displays information about the auto-MDIX setting for a specific interface?​ A. show controllers B. show interfaces C. show running-config D. show processes

D. VLAN 1

Which interface is the default location that would contain the IP address used to manage a 24-port Ethernet switch? A. Fa0/0 B. VLAN 99 C. Fa0/1 D. VLAN 1 E. interface connected to the default gateway

A. configuring port security

Which method would mitigate a MAC address flooding attack? A. configuring port security B. increasing the size of the CAM table C. increasing the speed of switch ports D. using ACLs to filter broadcast traffic on the switch​

B. CDP

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? A. DNS B. CDP C. DHCP D. SSH

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

Which three statements are true about using full-duplex Fast Ethernet? (Choose three.) A. Performance is improved with bidirectional data flow. B. Latency is reduced because the NIC processes frames faster. C. Full-duplex Fast Ethernet offers 100 percent efficiency in both directions. D. Performance is improved because the NIC is able to detect collisions. E. Performance is improved because the collision detect function is disabled on the device. F. Nodes operate in full-duplex with unidirectional data flow.

B. simulating attacks against the production network to determine any existing vulnerabilities D. revealing the type of information an attacker is able to gather from monitoring network traffic

Which two basic functions are performed by network security tools? (Choose two.) A. controlling physical access to user devices B. simulating attacks against the production network to determine any existing vulnerabilities C. writing a security policy document for protecting networks D. revealing the type of information an attacker is able to gather from monitoring network traffic E. educating employees about social engineering attacks

C. 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. E. Dynamically learned secure MAC addresses are lost when the switch reboots.

Which two statements are true regarding switch port security? (Choose two.) A. The three configurable violation modes all require user intervention to re-enable ports. B. After entering the sticky parameter, only MAC addresses subsequently learned are converted to secure MAC addresses. C. 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. D. The three configurable violation modes all log violations via SNMP. E. Dynamically learned secure MAC addresses are lost when the switch reboots.

D. a console cable

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. a coaxial cable B. a crossover cable C. a straight-through cable D. a console cable

D. The port is experiencing errors

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? A. The port has an active link with normal traffic activity. B. A PC is using the wrong cable to connect to the port. C. The port is administratively down. D. The port is experiencing errors. E. The port has no link.

Full-duplex

__________ communication allows both ends of a connection to transmit and receive data