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Cisco 640-821 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Routing and WAN Basics | 15% | - Basic network troubleshooting - Static and dynamic routing principles - Routing table overview - Common WAN technologies |
| IP Addressing and Subnetting | 25% | - ARP, ICMP, and DHCP operation - IPv4 addressing and classes - Subnetting and VLSM - Private vs public IP addressing |
| Cisco IOS Basics | 20% | - Password and security basics - Managing configuration files - Initial device configuration - IOS navigation and command-line interface |
| Network Fundamentals | 25% | - Network types: LAN, WAN, WLAN - Ethernet standards and operation - OSI and TCP/IP model layers - Network components: routers, switches, hubs, cables |
| Switching Fundamentals | 15% | - VLAN basics and configuration - Switch operation and port configuration - LAN switching concepts |
Cisco Introduction to Cisco Networking Technologies Sample Questions:
A network administrator is connecting PC hosts A and B directly through their Ethernet interfaces as shown in the graphic. Ping attempts between the hosts are unsuccessful.
What can be done to provide connectivity between the hosts? (Choose two.)
- A. The subnet masks should be set to 255.255.255.192.
- B. The hosts must be reconfigured to use private IP addresses for direct connections of this type.
- C. A rollover cable should be used in place of the straight-through cable
- D. The subnet masks should be set to 255.255.255.0.
- E. A default gateway needs to be set on each host.
- F. A crossover cable should be used in place of the straight-through cable.
Correct Answer: D,F 🗳️
What command will disable CDP on a router interface?
- A. router(config-if)# no cdp enable
- B. router(config-if)# no cdp run
- C. router(config-if)# no cdp active
- D. router(config-if)# no cdp
Correct Answer: A 🗳️
A network administrator is connecting PC hosts A and B directly through their Ethernet interfaces as shown in the graphic. Ping attempts between the hosts are unsuccessful.
What can be done to provide connectivity between the hosts? (Choose two.)
- A. The subnet masks should be set to 255.255.255.192.
- B. The hosts must be reconfigured to use private IP addresses for direct connections of this type.
- C. A rollover cable should be used in place of the straight-through cable
- D. The subnet masks should be set to 255.255.255.0.
- E. A default gateway needs to be set on each host.
- F. A crossover cable should be used in place of the straight-through cable.
Correct Answer: D,F 🗳️
Refer to the graphic. A Cisco router and a Catalyst switch are connected as shown. The technician is working on a computer that is connected to the management console of the switch. In order to configure the default gateway for the switch, the technician needs to learn the IP address of the attached router interface. Which IOS command will provide this information in the absence of Layer 3 connectivity?
- A. show dhcp-config
- B. ping router_ip_address
- C. show ip neighbors
- D. show ip rarp
- E. show cdp neighbors detail
- F. ping switch_ip_address
Correct Answer: E 🗳️
