Cisco Certified Technician (CCNA) complete
Exam *Q&A* (100% Correct) 2025/2026
|VERIFIED|
What command can be used to view the files stored in flash memory, including their sizes and
filenames?
show flash
Which command is specifically designed for platforms with a PCMCIA memory card and can display
details about the Cisco IOS software image?
show disk
Which command is used on routers with two banks of Flash to show information about both the boot
and system images?
show bootflash
What does the show environment command display, and how does it vary by Cisco device?
It shows the status of power supply fans, system temperature, and the time since the
measurements were last updated.
Which command shows information about the installed modules, their slot locations, model numbers,
and network ports?
show module
For diagnostic tasks, which command helps check whether a cable is connected properly and if clock
rates are detected on serial WAN interfaces?
show controllers serial
Which command provides diagnostic information about the hardware installed in a Cisco device,
including slot and module details?
1
, show diag
What is the show service-module command used for in terms of WAN performance, and what specific
details does it provide?
It displays the performance report for CSU/DSU modules, including loopback mode, layer 1
framing, and clock source.
Which command can summarize router interfaces, showing the type, IP address, and status of each
interface?
show ip interface brief
What type of statistics does the show interfaces command provide for Cisco routers and switches?
It provides information on interface status, MAC and IP addresses, encapsulation types, and
traffic rates.
What does the show cdp neighbors command reveal about directly connected Cisco devices?
It shows the hostname, local interface, device capability, model, and neighbor interface.
What information can you gather from the show ip route command regarding routing tables?
It displays the route learned method, destination network, metrics, next-hop router, and interface
information.
Which command provides a quick overview of the most important switch port characteristics such as
port status, VLAN, and speed?
show interfaces status
What is the purpose of the show isdn status command in troubleshooting ISDN interfaces?
It verifies the ISDN switch type, layer 1 status, TEI status, and service profile identifier state.
Which command is used to display statistics for PVCs in a Frame Relay network, showing the status of
active local PVCs and packet counts?
2
, show frame-relay pvc
What is a Permanent Virtual Circuit (PVC) in a Frame Relay network?
It is a software-defined logical connection between endpoints with defined bandwidth.
What is Frame Relay, and how does it function in relation to other technologies like ISDN and ATM?
It is a cost-efficient telecommunication service that uses frames for data transmission, providing
mid-range service between ISDN and ATM.
What information does the show frame-relay lmi command provide for troubleshooting Frame Relay
connections?
It shows the status of the local management interface (LMI) keepalive protocol, indicating layer 2
connectivity with the Frame Relay provider.
In which order does a router search for a bootable IOS image, and what steps are involved?
Checks the configuration register setting, Parses config for boot system command, Defaults to
first file in flash memory, Attempts to boot from network server, Boots helper image, Loads the ROM
Monitor (ROMMON) program.
How are the wires in a rollover cable configured between the two ends?
The 8 wires are flipped entirely, with pin 1 becoming pin 8, pin 2 becoming pin 7, and so on.
What is the default bit speed for a Cisco console port?
9600
What is the maximum number of interfaces supported by the Cisco 7300 series routers?
Over 70 interfaces
Which series of Cisco routers supports up to 15 million packets per second routing?
7600 series
3
