Exam Code: 640-822
Exam Name: Interconnecting Cisco Networking Devices Part 1
Updated: Jul 21, 2026
Q & A: 350 Questions and Answers
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| Section | Objectives |
|---|---|
| Topic 1: Infrastructure Services | - IP services
|
| Topic 2: Infrastructure Maintenance | - Troubleshooting methodology
|
| Topic 3: LAN Switching Technologies | - VLANs
|
| Topic 4: Network Fundamentals | - IP addressing and subnetting
|
| Topic 5: Routing Fundamentals | - Inter-VLAN routing concepts
|
1. Refer to the exhibit.
The IP address space of 128.107.7.0/24 has been allocated for all devices on this network. All devices must use the same subnet mask and all subnets are usable. Which subnet mask is required to apply the allocated address space to the configuration that is shown?
A) 255.255.255.0
B) 255.255.255.224
C) 255.255.254.0
D) 255.255.255.128
E) 255.255.255.192
2. What technology should be used when a router that connects to a LAN has only one WAN interface, but multiple virtual circuits are needed?
A) DSL
B) Frame Relay
C) ATM
D) Cable
E) ADSL
3. Why would a network administrator configure port security on a switch?
A) to prevent unauthorized Telnet access to a switch port
B) to limit the number of Layer 2 broadcasts on a particular switch port
C) to prevent unauthorized hosts from accessing the LAN
D) block unauthorized access to the switch management interfaces
4. A network administrator has subnetted the 172.16.0.0 network using a subnet mask of
255.255.255.192. A duplicate IP address of 172.16.2.120 has accidentally been configured on a workstation in the network. The technician must assign this workstation a new IP address within that same subnetwork. Which address should be assigned to the workstation?
A) 172.16.2.127
B) 172.16.2.80
C) 172.16.1.80
D) 172.16.1.64
E) 172.16.2.64
F) 172.16.2.128
5. At startup, what does a router do if it cannot access a configuration file?
A) It shuts down in 10 seconds.
B) It displays the prompt for user exec mode.
C) It enters global configuration mode.
D) It prompts for the location of the configuration file.
E) It prompts the user to enter setup mode.
Solutions:
| Question # 1 Answer: E | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: B | Question # 5 Answer: E |
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