A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem?

• The cable is not connected properly to the NIC.
• The computer has an incorrect subnet mask.
• The computer has an invalid default gateway address.
• The computer has an invalid IP address.

A network administrator configures a router with the command sequence:

R1(config)# boot system tftp://c1900-universalk9-mz.SPA.152-4.M3.bin
R1(config)# boot system rom

What is the effect of the command sequence?

• On next reboot, the router will load the IOS image from ROM.
• The router will copy the IOS image from the TFTP server and then reboot the system.
• The router will load IOS from the TFTP server. If the image fails to load, it will load the IOS image from ROM.
• The router will search and load a valid IOS image in the sequence of flash, TFTP, and ROM.

A network administrator is deploying QoS with the ability to provide a special queue for voice traffic so that voice traffic is forwarded before network traffic in other queues. Which queuing method would be the best choice?

• CBWFQ
• FIFO
• LLQ
• WFQ

A network designer is considering whether to implement a switch block on the company network. What is the primary advantage of deploying a switch block?

• A single core router provides all the routing between VLANs.
• The failure of a switch block will not impact all end users.
• This is a security feature that is available on all new Catalyst switches.
• This is network application software that prevents the failure of a single network device.

A network engineer performs a ping test and receives a value that shows the time it takes for a packet to travel from a source to a destination device and return. Which term describes the value?

• bandwidth
• jitter
• latency
• priority

A network manager wants lists the contents of flash. What command should the administrator use on a Cisco router?

• dir
• lldp enable
• service timestamps log datetime
• show file systems

A network manager wants to add a time to log messages so that there is record of when the message was generated. What command should the administrator use on a Cisco router?

• show cdp interface
• service timestamps log datetime
• clock timezone PST -7
• ntp server 10.10.14.9

A network manager wants to backup the running configuration to a file server. What command should the administrator use on a Cisco router?

• cd usbflash0:
• copy running-config tftp
• dir
• show file systems

A network manager wants to configure the router to load a new image from flash during bootup. What command should the administrator use on a Cisco router?

• boot system
• clock set 14:25:00 nov 13 2018
• copy flash: tftp:
• copy tftp startup-config

A network manager wants to determine the size of the Cisco IOS image file on the networking device. What command should the administrator use on a Cisco router?

• config-register 0x2102
• confreg 0x2142
• copy flash: tftp:
• show flash:0