Module 7.6.3 Cisco Switches and Routers Quiz Answers

Module 7.6.3 Cisco Switches and Routers Quiz Answers

Network Addressing and Basic Troubleshooting – Module 7.6.3 Cisco Switches and Routers Quiz Answers

1. A technician is setting up a network in a new room. What is the best device to use to connect the PCs to each other and to the rest of the LAN?

  • gateway
  • firewall
  • switch
  • router

Explanation: A gateway is a router used to interconnect networks and is not necessary in this situation. A hub does not segment a network and allows collisions to take place on the network segment. A switch will interconnect all the devices in a LAN.

2. What is a characteristic of in-band device management?

  • It uses a terminal emulation client.
  • It is used for initial configuration or when a network connection is unavailable.
  • It uses a direct connection to a console or AUX port.
  • It is used to monitor and make configuration changes to a network device over a network connection.

Explanation: In-band device management is used to monitor and make configuration changes to a network device over a network connection. Configuration using in-band management requires at least one network interface on the device to be connected and to be operational, and it requires the use of Telnet, SSH, or HTTP to access the device.

3. Which advantage does the store-and-forward switching method have compared with the cut-through switching method?

  • collision detecting
  • frame error checking
  • faster frame forwarding
  • frame forwarding using IPv4 Layer 3 and 4 information

Explanation: A switch using the store-and-forward switching method performs an error check on an incoming frame by comparing the FCS value against its own FCS calculations after the entire frame is received. In comparison, a switch using the cut-through switching method makes quick forwarding decisions and starts the forwarding process without waiting for the entire frame to be received. Thus a switch using cut-through switching may send invalid frames to the network. The performance of store-and-forward switching is slower compared to cut-through switching performance. Collision detection is monitored by the sending device. Store-and-forward switching does not use IPv4 Layer 3 and 4 information for its forwarding decisions.

4. What are two functions of NVRAM? (Choose two.)

  • to store the routing table
  • to retain contents when power is removed
  • to store the startup configuration file
  • to contain the running configuration file
  • to store the ARP table

Explanation: NVRAM is permanent memory storage, so the startup configuration file is preserved even if the router loses power.

5. Following default settings, what two tasks are performed first in the router boot sequence? (Choose two.)

  • Perform the POST routine.
  • Locate and load the startup-config file from NVRAM.
  • Load the bootstrap program from ROM.
  • Load the running-config file from RAM.
  • Locate and load the operating system.

Explanation: There are three major steps to the router boot sequence:

  1. Perform Power-On-Self-Test (POST) and load the bootstrap program.
  2. Load the IOS from Flash or TFTP server.
  3. Load the startup configuration file from NVRAM.

6. When a router is powered on, where will the router first search for a valid IOS image to load by default?

  • RAM
  • ROM
  • flash memory

Explanation: By default, if no boot system commands are in the configuration, a router will load the first valid Cisco IOS image in flash memory and run it. RAM is active memory that is not used to store image files. NVRAM stores configuration files. ROM stores a minimal version of the Cisco IOS image that can be used to provide limited functions if a valid IOS image is not available in flash memory.

7. Which two requirements must always be met to use in-band management to configure a network device? (Choose two.)

  • a direct connection to the console port
  • a direct connection to the auxiliary port
  • a terminal emulation client
  • at least one network interface that is connected and operational
  • Telnet, SSH, or HTTP access to the device

Explanation: Direct connections to the console and auxiliary ports allow for out-of-band management. Terminal emulation software is not always required because in-band management can be performed using a browser.

8. Which two files are loaded into RAM of a Cisco switch when it is booted? (Choose two.)

  • routing table
  • IOS image file
  • file that contains customer settings
  • startup configuration file
  • running configuration file

Explanation: When a Cisco device boots, it loads the IOS and startup configuration files into RAM.

9. A router boots and enters setup mode. What is the reason for this?

  • The IOS image is corrupt.
  • Cisco IOS is missing from flash memory.
  • The configuration file is missing from NVRAM.
  • The POST process has detected hardware failure.

Explanation: If a router cannot locate the startup-config file in NVRAM, it will enter setup mode to allow the configuration to be entered from the console device.

10. Which two statements describe out-of-band network management? (Choose two.)

  • does not require a physical connection
  • uses Telnet, HTTP or SSH protocols
  • used for initial device configuration
  • used when network connectivity to the device is not available
  • requires an active network connection to the device

Explanation: An out-of-band connection can be used for initial configuration of a device before any network connectivity exists to the device. Unlike in-band connections, out-of-band management requires a direct connection to the console or aux port on the device and the use of a terminal emulation program in order to access the IOS CLI.

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