A field technician is dispatched to a remote office to replace a faulty HWIC-4ESW in a Cisco 2911 ISR. After physically installing the new card and powering on the router, the technician observes that the new switch ports are not recognized by the IOS. Which command should the technician use in privileged EXEC mode to verify that the router's hardware is physically detecting the new module?
Answer and explanation
Correct answer: B
The show inventory command provides a detailed list of all physical hardware components detected by the router, including chassis, modules, cards (like HWICs), and SFPs. It will display the Product ID (PID) and Serial Number (SN) of the installed hardware. This is the correct command to confirm if the router's mainboard is physically recognizing the newly installed module, even before the IOS has configured interfaces for it.
Question 2
A technician is performing a password recovery on a Cisco Catalyst 3750 switch. After interrupting the boot process and issuing the flash_init and load_helper commands, the technician renames the configuration file. What is the next command required to proceed with booting the system into the setup wizard?
Answer and explanation
Correct answer: C
After initializing the flash and renaming the configuration file (e.g., rename flash:config.text flash:config.bak), the boot command is used from the switch: prompt (ROMMON) to continue the boot process. Since the original config.text is not found, the switch will load without a configuration, allowing the technician to enter privileged EXEC mode and reset the password.
Question 3
Multiple answers
A field technician needs to connect a laptop's serial port to the console port of a Cisco 2960 switch for initial configuration. The laptop does not have a native DB-9 serial port, so a USB-to-Serial adapter is being used. Which three settings are required to be configured in the terminal emulation software (e.g., PuTTY) to establish a successful console session? (Select THREE)
Answer and explanation
Correct answers: A, C, D
The default speed for a Cisco console port is 9600 bps.
The standard setting for data bits is 8.
The parity bit is not used and should be set to 'None'.
Question 4
A technician is onsite to replace a customer's router. After completing the physical replacement and loading the configuration, the technician must document the work for the service ticket. According to standard professional service procedures, what is the most critical piece of information to record from the old, replaced device before it is shipped back for RMA?
Answer and explanation
Correct answer: B
The chassis serial number is the unique identifier for the physical hardware. It is absolutely essential for the Return Material Authorization (RMA) process. Cisco uses this number to track the faulty unit, validate the service contract, and process the return. Failure to record the correct serial number can lead to significant delays and complications in closing the service ticket and processing the RMA.
Question 5
Case Study:
A regional bank, FinSecure, is upgrading its branch offices. A junior field technician is sent to a small branch to install a new Cisco ISR 4331 router. The work order specifies that the router must be configured with a basic setup to allow a senior engineer to access it remotely for final provisioning. The technician has console access but there is no existing network connectivity at the site yet.
The technician's task is to configure one of the Gigabit Ethernet interfaces (GigabitEthernet0/0/0) so the senior engineer can connect a laptop directly to it and access the router's command line via SSH. The senior engineer's laptop will be statically assigned the IP address 192.168.100.10/24.
Requirements:
Configure the router's GigabitEthernet0/0/0 interface with the first usable IP address in the 192.168.100.0/24 network.
Enable the interface.
Set a hostname of FS-Branch-4331.
Create a local user remote_admin with a privilege level of 15 and a secret password C1sc0!23.
Configure the VTY lines for SSH access only and use the local database for authentication.
Generate RSA crypto keys of 1024 bits.
Which command is missing from the technician's configuration plan to meet all requirements?
Answer and explanation
Correct answer: C
To generate RSA keys for SSH, the crypto key generate rsa command requires two prerequisites: a hostname and an IP domain name. The case study mentions setting the hostname, but it does not mention setting an IP domain name. Without the ip domain-name command being configured in global configuration mode, the RSA key generation will fail, and consequently, SSH access cannot be enabled. This is a critical and often overlooked step in the initial setup for SSH.
Question 6
True or False: A Cisco straight-through cable can be used to connect a PC's network interface card directly to a Cisco router's FastEthernet port for network connectivity.
Answer and explanation
Correct answer: B
This statement is false. Both a PC's NIC and a router's Ethernet port are DTE (Data Terminal Equipment) devices, which use the same pins for transmitting and receiving (MDI). To connect two like devices, a crossover cable is required to swap the transmit and receive pairs. A straight-through cable would be used to connect a PC to a switch (DCE/MDI-X device). While modern devices often support Auto-MDI/MDI-X, the standard cabling rule requires a crossover.
Question 7
A technician is examining a Cisco Catalyst 4507R+E switch chassis. How can the technician visually distinguish the redundant supervisor engine slots from the line card slots without powering down the device or accessing the CLI?
Answer and explanation
Correct answer: C
On many modular Cisco chassis, including the Catalyst 4500 series, the slots designated for supervisor engines are physically marked to prevent incorrect installation. This often includes a colored outline (typically red or yellow) around the slot opening on the chassis frame and specific labeling indicating it is a supervisor slot. These visual cues are designed for technicians to quickly and accurately identify the correct placement for these critical components.
Question 8
A technician enters the command show ip interface brief and sees the following output for interface FastEthernet0/1:
FastEthernet0/1 10.10.10.1 YES manual administratively down down
What is the most direct cause for the interface's status being 'administratively down'?
Answer and explanation
Correct answer: B
The status 'administratively down' specifically means that the shutdown command has been issued in the interface's configuration mode. This is a deliberate action by an administrator to disable the port. To bring the interface up, the no shutdown command must be used. Other issues like a missing cable or speed mismatch would result in a line protocol status of 'down', but the administrative status would be 'up'.
Question 9
Multiple answers
A technician is tasked with creating a T1 loopback plug to test a serial interface on a router. Which two pairs of pins on the RJ-45 connector must be connected (looped) to create this plug? (Select TWO)
Answer and explanation
Correct answers: A, C
Pin 1 (Receive Ring) is looped to Pin 4 (Transmit Ring).
Pin 2 (Receive Tip) is looped to Pin 5 (Transmit Tip).
Question 10
During a preventative maintenance visit, a field technician is asked to verify the integrity of the IOS image file stored in the flash memory of a Cisco 3945 router. Which command allows the technician to calculate and display an MD5 hash of the IOS file to compare against the hash value provided on Cisco.com?
Answer and explanation
Correct answer: C
The verify /md5 command is the specific IOS tool used to compute an MD5 checksum for a file stored in a file system like flash memory. The technician would run this command, specifying the full path to the IOS image file, and then compare the output hash with the one published on the Cisco Software Download site to ensure the file has not been corrupted or tampered with.
