Cisco Certified Support Technician (CCST) Networking 100-150 Exam Questions

Answer : C

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

Answer : C

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

Answer : D

* 1000BASE-T Cable: This refers to Gigabit Ethernet over twisted-pair cables (Cat 5e or higher).

* Connector: RJ-45 connectors are used for Ethernet cables, including those used for 1000BASE-T.

* Coax: Used for cable TV and older Ethernet standards like 10BASE2.

* RJ-11: Used for telephone connections.

* OS2 LC: Used for fiber optic connections.

* Ethernet Standards and Cables: Ethernet Cable Guide

Answer : A

WPA2-Personal, also known as WPA2-PSK (Pre-Shared Key), is the wireless security option that uses a pre-shared key to authenticate clients. This method is designed for home and small office networks and doesn't require an authentication server. Instead, every user on the network uses the same key or passphrase to connect1.

* What is a Wi-Fi Protected Access Pre-Shared Key (WPA-PSK)?

* Exploring WPA-PSK and WiFi Security

=========================

* WPA2-Personal: This wireless security option uses a pre-shared key (PSK) for authentication. Each client that connects to the network must use this key to gain access. It is designed for home and small office networks where simplicity and ease of use are important.

* WPA2-Enterprise: Unlike WPA2-Personal, WPA2-Enterprise uses 802.1x authentication with an authentication server (such as RADIUS) and does not rely on a pre-shared key.

* 802.1x: This is a network access control protocol for LANs, particularly wireless LANs. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN.

* 802.1q: This is a networking standard that supports VLAN tagging on Ethernet networks and is not related to wireless security.

* Cisco Documentation on WPA2 Security: Cisco WPA2

* Understanding Wireless Security: Wireless Security Guide

Answer : B

When prioritizing trouble tickets, the most critical issues affecting business operations or high-impact activities should be addressed first. Here's a breakdown of the tickets:

Ticket 1: Relocation of a printer, while necessary, is not urgent and does not impact critical operations.

Ticket 2: An ongoing webinar losing internet access is critical, especially if the webinar is time-sensitive and involves multiple participants.

Ticket 3: Slower response time for a cloud-based application is important but typically not as urgent as a complete loss of internet access for a live event.

Ticket 4: Wireless access down in the cafeteria affects users but does not have the same immediate impact as a live webinar losing connectivity.

Thus, the correct answer is B. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.

IT Help Desk Best Practices

Prioritizing IT Support Tickets

Answer : B

* 192.168.200.0/24 Network: This subnet includes all addresses from 192.168.200.0 to 192.168.200.255. The /24 indicates a subnet mask of 255.255.255.0, which allows for 256 addresses.

* 192.168.199.13: This address is in the 192.168.199.0/24 subnet, not the 192.168.200.0/24 subnet.

* 192.168.200.13: This address is within the 192.168.200.0/24 subnet.

* 192.168.201.13: This address is in the 192.168.201.0/24 subnet, not the 192.168.200.0/24 subnet.

* 192.168.1.13: This address is in the 192.168.1.0/24 subnet, not the 192.168.200.0/24 subnet.

* Subnetting Guide: Subnetting Basics

Answer : D

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