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The colored wires at one end of a cable are in reverse sequence to the colored wires at the other end of the
cable. Which cable does this configuration describe?
Which two commands are valid for copying a saved configuration to RAM? (Choose two.)
The commands to copy a saved configuration to RAM on Cisco devices are:
The other options listed are not valid for copying a saved configuration to RAM:
copy running-config startup-configcopies the current running configuration to the startup configuration, which is the opposite of what's asked.
copy running-config tftpis used to save the running configuration to a TFTP server, not to copy to RAM.
copy tftp startup-configwould copy a file from a TFTP server to the startup configuration, not to the running configuration in RAM.
Which two sets of pins are looped on an RJ-45 56K loopback plug? (Choose two.)
An RJ-45 56K loopback plug is used to test the functionality of network ports, particularly for T1/56K lines. The correct loopback wiring for such a plug involves looping pins 1 and 4, as well as pins 2 and 5. This configuration allows the device to send and receive signals on the same wire pairs, effectively testing the transmit and receive paths of the port1.
Which command shows the status of power supplies and sensor temperatures?
The show environment command in Cisco devices is used to display the status of the system's environment, including power supplies and sensor temperatures. This command provides a comprehensive overview of the environmental conditions affecting the device, such as temperature readings and power supply status.
Option A, show hardware, is not specific to power supplies and sensor temperatures. Option B, show module, displays information about the network modules installed in the device but not the environmental conditions. Option D, show diag, is used for diagnostic purposes and does not specifically provide the status of power supplies and sensor temperatures.
Cisco Community discussions on power supply details1.
Cisco documentation on Environmental Monitoring and Power Management2.
Which type of memory stores the configuration of a router or switch by default?
NVRAM (Non-Volatile Random Access Memory) is the default storage location for the startup configuration file of a Cisco router or switch.expand_more Here's why:
Non-Volatility: NVRAM retains its contents even when the device loses power.expand_more This is essential for storing the startup configuration, which contains critical settings like interface configurations, routing protocols, and passwords.
Read/Write Capability: Unlike ROM, NVRAM allows you to both read and write data. This makes it possible to modify the configuration and save the changes into NVRAM as the startup configuration.
Other Memory Types and Their Functions:
RAM (Random Access Memory): RAM is volatile memory, meaning it loses its contents when the device is powered off.expand_more It's used to store the running configuration (currently active configuration), routing tables, and other temporary data required for the device's operation.
ROM (Read-Only Memory): ROM is non-volatile and stores the bootstrap program used to initiate the boot process of the device.expand_more It's not modifiable by the user.expand_more
Flash: Flash memory is also non-volatile.expand_more It's primarily used to store the Cisco IOS image (operating system) and can also store backup configuration files and other data.
