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Cisco 640-821 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Cisco IOS Basics | - Basic device configuration - Command line interface (CLI) navigation - Show and debug commands |
| WAN Technologies | - WAN connection types - PPP and Frame Relay basics (legacy) |
| Routing Fundamentals | - Static routing basics - Routing table concepts |
| IP Addressing and Subnetting | - IPv4 addressing structure - Subnet masks and CIDR notation - Basic subnetting calculations |
| Network Fundamentals | - LAN/WAN concepts - OSI and TCP/IP models - Network topologies and components |
| LAN Switching Technologies | - Switch operation and MAC address table - VLAN concepts - Trunking basics |
| Network Security Basics | - Basic access control concepts - Device hardening overview |
Cisco Introduction to Cisco Networking Technologies Sample Questions:
Refer to the exhibit. Why did the device return this message?
- A. The command is being executed from the wrong router mode.
- B. There is more than one show command that starts with the letters ru.
- C. The command requires additional options or parameters.
- D. There is no show command that starts with ru.
A network associate needs to configure a router by connecting a remote computer to the router through the router auxiliary port. Which two statements describe the hardware required to make the connection to the router? (Choose two.)
- A. The technician needs an Ethernet transceiver.
- B. The auxiliary port must be connected to an Ethernet LAN.
- C. The auxiliary port must be connected to a modem.
- D. The technician needs an RJ-45 to DB25 adapter.
Which command can be used to determine the type of cable attached to the Serial 0/0 interface on a router?
- A. show version
- B. show line serial 0/0
- C. show controllers serial 0/0
- D. show ip interface
- E. show interfaces serial 0/0
- F. show running-config
Why is the show processes command used on a router before a debug command is entered?
- A. to check if the load meter file has enough space left to store the output of the debug command
- B. to verify the IOS version that is running
- C. to verify that the CPU utilization is low enough to handle the effects of a debug command
- D. to verify the amount of space in flash memory
- E. to view the number of timers that are currently in use
Which of the following commands displays the configurable parameters and statistics of all interfaces on a router?
- A. show interfaces
- B. show startup-config
- C. show processes
- D. show running-config
- E. show versions
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