Free Cisco CCST-Networking Exam Practice Questions & Explanations
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An engineer configured a new VLAN named VLAN2 for the Data Center team. When the team tries to ping addresses outside VLAN2 from a computer in
VLAN2, they are unable to reach them.
What should the engineer configure?
When devices within a VLAN are unable to reach addresses outside their VLAN, it typically indicates that they do not have a configured path to external networks. The engineer should configure a default gateway for VLAN2. The default gateway is the IP address of the router's interface that is connected to the VLAN, which will route traffic from the VLAN to other networks12.
* Understanding and Configuring VLAN Routing and Bridging on a Router Using the IRB Feature
* VLAN 2 not able to ping gateway - Cisco Community
* VLANs: Virtual Local Area Networks (VLANs) logically segment network traffic to improve security and performance. Devices within the same VLAN can communicate directly.
* Default Gateway: For devices in VLAN2 to communicate with devices outside their VLAN, they need a default gateway configured. The default gateway is typically a router or Layer 3 switch that routes traffic between different VLANs and subnets.
* Additional VLAN: Not needed in this scenario as the issue is related to routing traffic outside VLAN2, not creating another VLAN.
* Default Route: While a default route on the router may be necessary, the primary issue for devices within VLAN2 is to have a configured default gateway.
* Static Route: This is used on routers to manually specify routes to specific networks but does not address the need for a default gateway on the client devices.
* Cisco VLAN Configuration Guide: Cisco VLAN Configuration
* Understanding and Configuring VLANs: VLANs Guide
A support technician examines the front panel of a Cisco switch and sees 4 Ethernet cables connected in the first four ports. Ports 1, 2, and 3 have a green
LED. Port 4 has a blinking green light.
What is the state of the Port 4?
On a Cisco switch, a port with a blinking green LED typically indicates that the port is up (active) and is currently transmitting or receiving data. This is a normal state indicating active traffic on the port.
* A. Link is up with cable malfunctions: Usually indicated by an amber or blinking amber light.
* B. Link is up and not stable: Not typically indicated by a green blinking light.
* D. Link is up and there is no activity: Would be indicated by a solid green light without blinking.
Thus, the correct answer is C. Link is up and active.
* Cisco Switch LED Indicators
* Cisco Ethernet Switch LED Patterns
A Cisco PoE switch is shown in the following image. Which type of port will provide both data connectivity and power to an IP phone?
In the provided image of the Cisco PoE switch, the ports identified with number 6 are the standard RJ-45 Ethernet ports typically found on switches that provide both data connectivity and Power over Ethernet (PoE). PoE ports are designed to supply power to devices such as IP phones, wireless access points, and other PoE-enabled devices directly through the Ethernet cable.
Ports:
* 2: Console port (for management and configuration)
* 3 and 4: Specific function ports (often for management)
* 6: RJ-45 Ethernet ports (capable of providing PoE)
* 7: SFP ports (for fiber connections, typically do not provide PoE)
Thus, the correct answer is C. Ports identified with number 6.
* Cisco Catalyst 2960-L Series Switches Data Sheet
* Cisco PoE Overview
A local company requires two networks in two new buildings. The addresses used in these networks must be in the private network range.
Which two address ranges should the company use? (Choose 2.)
Note: You will receive partial credit for each correct selection.
The private IP address ranges that are set aside specifically for use within private networks and not routable on the internet are as follows:
Class A: 10.0.0.0 to 10.255.255.255
Class B: 172.16.0.0 to 172.31.255.255
Class C: 192.168.0.0 to 192.168.255.255
Given the options: A. 172.16.0.0 to 172.31.255.255 falls within the Class B private range. B. 192.16.0.0 to 192.16.255.255 is not a recognized private IP range. C. 11.0.0.0 to 11.255.255.255 is not a recognized private IP range. D. 192.168.0.0 to 192.168.255.255 falls within the Class C private range.
Therefore, the correct selections that the company should use for their private networks are A and D.
Reserved IP addresses on Wikipedia
Private IP Addresses in Networking - GeeksforGeeks
Understanding Private IP Ranges, Uses, Benefits, and Warnings
A host is given the IP address 172.16.100.25 and the subnet mask 255.255.252.0.
What is the CIDR notation for this address?
The CIDR (Classless Inter-Domain Routing) notation for the subnet mask 255.255.252.0 is /22. This notation indicates that the first 22 bits of the IP address are used for network identification, and the remaining bits are used for host addresses within the network1.
* Subnet Cheat Sheet -- 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network Reference
* Subnet Mask to CIDR Notation: The given subnet mask is 255.255.252.0. To convert this to CIDR notation:
* Convert the subnet mask to binary: 11111111.11111111.11111100.00000000
* Count the number of consecutive 1s in the binary form: There are 22 ones.
* Therefore, the CIDR notation is /22.
* Understanding Subnetting and CIDR: Cisco CIDR Guide