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Cisco 640-821 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: WAN Technologies | - WAN connection types - PPP and Frame Relay basics (legacy) |
| Topic 2: Network Security Basics | - Device hardening overview - Basic access control concepts |
| Topic 3: LAN Switching Technologies | - Trunking basics - VLAN concepts - Switch operation and MAC address table |
| Topic 4: Network Fundamentals | - LAN/WAN concepts - OSI and TCP/IP models - Network topologies and components |
| Topic 5: IP Addressing and Subnetting | - IPv4 addressing structure - Basic subnetting calculations - Subnet masks and CIDR notation |
| Topic 6: Cisco IOS Basics | - Show and debug commands - Command line interface (CLI) navigation - Basic device configuration |
| Topic 7: Routing Fundamentals | - Static routing basics - Routing table concepts |
Cisco Introduction to Cisco Networking Technologies Sample Questions:
Which three statements are true about the operation of a full-duplex Ethernet network?
(Choose three.)
- A. There are no collisions in full-duplex mode.
- B. A dedicated switch port is required for each full-duplex node.
- C. Ethernet hub ports are preconfigured for full-duplex mode.
- D. The host network card and the switch port must be capable of operating in full-duplex mode.
- E. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
Correct Answer: A,B,D 🗳️
Refer to the exhibit. If host A sends an IP packet to host B, what will the OSI Layer 3 source address be in the packet when it reaches host B?
- A. 10.168.11.65
- B. 10.168.10.99
- C. B2:B2:B2:B2:B2:B2
- D. C3:C3:C3:C3:C3:C3
- E. A1:A1:A1:A1:A1:A1
- F. 10.168.11.88
Correct Answer: B 🗳️
An administrator cannot connect from R1 to R2. To troubleshoot this problem, the administrator has entered the command shown in the exhibit. Based on the output shown, what could be the problem?
- A. The serial interface is configured for the wrong frame size.
- B. The serial interface is configured for half duplex.
- C. The serial interface has a full buffer.
- D. The serial interface does not have a cable attached.
- E. The serial interface has the wrong type of cable attached.
Correct Answer: E 🗳️
Refer to the graphic. What is the purpose of the two numbers shown following the exec- timeout command?
- A. If no commands have been typed in one minute and 55 seconds, the console connection will be closed.
- B. If connected to the router by Telnet, input must be detected within one minute and 55 seconds or the connection will be closed.
- C. If no router activity has been detected in one hour and 55 minutes, the console will be locked out.
- D. If no commands have been typed in 55 seconds, the console connection will be closed.
- E. If connected to the router by Telnet, input must be detected within one hour and 55 seconds or the connection will be closed.
Correct Answer: A 🗳️
Which of the following commands displays the configurable parameters and statistics of all interfaces on a router?
- A. show running-config
- B. show interfaces
- C. show startup-config
- D. show versions
- E. show processes
Correct Answer: B 🗳️
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