Download Cisco : 640-821 Questions & Answers as PDF & Test Software
Updated: Jun 01, 2026
No. of Questions: 91 Questions & Answers with Testing Engine
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Cisco Introduction to Cisco Networking Technologies Sample Questions:
1. 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 ip rarp
B) ping router_ip_address
C) show ip neighbors
D) show cdp neighbors detail
E) ping switch_ip_address
F) show dhcp-config
2. 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 255.255.255.0.
B) A default gateway needs to be set on each host.
C) The subnet masks should be set to 255.255.255.192.
D) The hosts must be reconfigured to use private IP addresses for direct connections of this type.
E) A rollover cable should be used in place of the straight-through cable
F) A crossover cable should be used in place of the straight-through cable.
3. Refer to the exhibit. SwitchA receives the frame with the addressing shown in the exhibit.
According to the command output also shown in the exhibit, how will SwitchA handle this frame?
A) It will forward the frame out port Fa0/6 only.
B) It will flood the frame out all ports except Fa0/3.
C) It will flood the frame out all ports.
D) It will drop the frame.
E) It will forward the frame out port Fa0/3 only.
4. Which types of cables are required to interconnect the devices shown in the graphic?
(Choose three.)
A) straight-through cable
B) rollover cable
C) USB cable
D) V.35 cable
E) crossover cable
F) RJ-11 cable
5. Which of the following commands displays the configurable parameters and statistics of all interfaces on a router?
A) show startup-config
B) show versions
C) show interfaces
D) show processes
E) show running-config
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: A,F | Question # 3 Answer: A | Question # 4 Answer: A,B,E | Question # 5 Answer: C |
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