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Cisco Certified Support Technician (CCST) Networking 100-150 Exam Questions
Question 1
Which command will display the following output?
Answer : B
The command that will display the output provided, which includes capability codes, local interface details, device IDs, hold times, and platform port ID capabilities, is the show cdp neighbor command. This command is used in Cisco devices to display current information about neighboring devices detected by Cisco Discovery Protocol (CDP), which includes details such as the interface through which the neighbor is connected, the type of device, and the port ID of the device1.
* Cisco - show cdp neighbors
The provided output is from the Cisco Discovery Protocol (CDP) neighbor table. The show cdp neighbor command displays information about directly connected Cisco devices, including Device ID, Local Interface, Holdtime, Capability, Platform, and Port ID.
* A. show mac-address-table: Displays the MAC address table on the switch.
* C. show inventory: Displays information about the hardware inventory of the device.
* D. show ip interface: Displays IP interface status and configuration.
Thus, the correct answer is B. show cdp neighbor.
* Cisco CDP Neighbor Command
* Understanding CDP
Question 2
Which two statements are true about the IPv4 address of the default gateway configured on a host? (Choose 2.)
Note: You will receive partial credit for each correct selection.
Answer : B, D
* Statement B: 'The same default gateway IPv4 address is configured on each host on the local network.' This is true because all hosts on the same local network (subnet) use the same default gateway IP address to send packets destined for other networks.
* Statement D: 'The default gateway is the IPv4 address of the router interface connected to the same local network as the host.' This is true because the default gateway is the IP address of the router's interface that is directly connected to the local network.
* Statement A: 'The IPv4 address of the default gateway must be the first host address in the subnet.' This is not necessarily true. The default gateway can be any address within the subnet range.
* Statement C: 'The default gateway is the Loopback0 interface IPv4 address of the router connected to the same local network as the host.' This is not true; the default gateway is the IP address of the router's physical or logical interface connected to the local network.
* Statement E: 'Hosts learn the default gateway IPv4 address through router advertisement messages.' This is generally true for IPv6 with Router Advertisement (RA) messages, but not typically how IPv4 hosts learn the default gateway address.
* Cisco Default Gateway Configuration: Cisco Default Gateway
Question 3
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.
Answer : A, D
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
These ranges are defined by the Internet Assigned Numbers Authority (IANA) and are used for local communications within a private network123.
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
Question 4
You need to connect a computer's network adapter to a switch using a 1000BASE-T cable.
Which connector should you use?
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
Question 5
A help desk technician receives the four trouble tickets listed below. Which ticket should receive the highest priority and be addressed first?
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
Question 6
Which device protects the network by permitting or denying traffic based on IP address, port number, or application?
Answer : A
Firewall: A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It permits or denies traffic based on IP addresses, port numbers, or applications.
Access Point: This is a device that allows wireless devices to connect to a wired network using Wi-Fi. It does not perform traffic filtering based on IP, port, or application.
VPN Gateway: This device allows for secure connections between networks over the internet, but it is not primarily used for traffic filtering based on IP, port, or application.
Intrusion Detection System (IDS): This device monitors network traffic for suspicious activity and policy violations, but it does not actively permit or deny traffic.
Understanding Firewalls: Firewall Basics
Question 7
A Cisco switch is not accessible from the network. You need to view its running configuration.
Which out-of-band method can you use to access it?
Answer : B
When a Cisco switch is not accessible from the network, the recommended out-of-band method to access its running configuration is through the console port. Out-of-band management involves accessing the network device through a dedicated management channel that is not part of the data network. The console port provides direct access to the switch's Command Line Interface (CLI) without using the network, which is essential when the switch cannot be accessed remotely via the network12.
Out-of-band (OOB) network interface configuration guidelines
Out of band management configuration
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