CCST-NETWORKING Online Practice Questions and Answers

Correct Answer: C

OSI model During the data encapsulation process, theData Link layerof the OSI model is responsible for adding a header that contains MAC addressing information and a trailer used for error checking.The header typically includes the source and destination MAC addresses, while the trailer contains a Frame Check Sequence (FCS) which is used for error detection1. The Data Link layer ensures that messages are delivered to the proper device on a LAN using hardware addresses and translates messages from the Network layer into bits for the Physical layer to transmit. It also controls how data is placed onto the medium and is received from the medium through the physical hardware. References: The OSI Model The 7 Layers of Networking Explained in Plain English OSI Model - Network Direction Which layer adds both header and trailer to the data? What is OSI Model | 7 Layers Explained - GeeksforGeeks

Correct 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. ?92.168.201.13: 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.

References:

Subnetting Guide: Subnetting Basics

Correct Answer: D

The primary purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch is to facilitate remote management of the switch. By configuring an IP address on the management VLAN, network administrators can

access the switch's Command Line Interface (CLI) remotely using protocols such as Telnet or Secure Shell (SSH). This allows for convenient configuration changes, monitoring, and troubleshooting without needing physical access to the

switch1.

References:

-Understanding the Management VLAN

-Cisco - VLAN Configuration Guide

-Remote Management of Switches

Assigning an IP address to the management VLAN interface (often the VLAN 1 interface by default) on a Layer 2 switch allows network administrators to remotely manage the switch using protocols such as Telnet or SSH. This IP address

does not affect the switch's ability to route traffic between VLANs but provides a means to access and configure the switch through its Command Line Interface (CLI).

-A: The switch does not act as a default gateway; this is typically a function of a Layer 3 device like a router.

-B: The switch does not resolve URLs; this is typically a function of DNS servers.

-C: The switch can relay DHCP requests but does not typically provide DHCP services

itself; this is usually done by a dedicated DHCP server or router.

Thus, the correct answer is D. To enable access to the CLI on the switch through Telnet or SSH.

References :

-Cisco VLAN Management Overview

-Cisco Catalyst Switch Management

Correct Answer: C

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.

References:

cisco Catalyst 2960-L Series Switches Data Sheet Cisco PoE Overview

Correct 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.

References:

IT Help Desk Best Practices

Prioritizing IT Support Tickets

Correct Answer: B

Out-of-band management

When a Cisco switch is not accessible from the network, the recommended out-of-band method to access its running configuration is through theconsole 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.

References:

Out-of-band (OOB) network interface configuration guidelines Out of band management configuration

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If you have any more questions or need further assistance, feel free to ask!

Correct 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 connect.

References:

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

-Exploring WPA-PSK and WiFi Security

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-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.

References:

Cisco Documentation on WPA2 Security: Cisco WPA2 Understanding Wireless Security: Wireless Security Guide

Correct Answer:

Three virtual machines are connected by a virtual network in the cloud. Users access a web-based graphics design application in the cloud for a monthly fee.

A company develops applications using cloud-based resources and tools.

IaaS (Infrastructure as a Service): Provides virtualized hardware resources that customers can use to build their own computing environments. PaaS (Platform as a Service): Offers a platform with tools and services to develop, test, and

deploy applications.

SaaS (Software as a Service): Delivers fully functional applications over the internet that users can access and use without managing the underlying infrastructure.

References:

Cloud Service Models: Understanding IaaS, PaaS, SaaS NIST Definition of Cloud Computing:NIST Cloud Computing

Correct Answer:

A firewall can direct all web traffic to a specific IP address. A firewall can block traffic to specific ports on internal computers. A firewall can prevent specific apps from running on a computer.

Directing Web Traffic: Firewalls can manage traffic redirection using NAT and port forwarding rules to route web traffic to designated servers or devices within the network.

Blocking Specific Ports: Firewalls can enforce security policies by blocking or allowing traffic based on port numbers, ensuring that only permitted traffic reaches internal systems.

Application Control: While firewalls manage network traffic, preventing applications from running typically requires software specifically designed for endpoint protection and application management.

References:

Understanding Firewalls: Firewall Capabilities

Network Security Best Practices: Network Security Guide

Correct Answer:

To list the IPv4 addresses associated with the host name www.companypro.net, you should use the following command:

nslookup www.companypro.net

This command will query the DNS servers to find the IP address associated with the hostname provided.If you want to ensure that it returns the IPv4 address, you can specify the-type=Aoption, which stands for Address records that hold IPv4

addresses1. However, thenslookupcommand by default should return the IPv4 address if available. To list the IPv4 addresses associated with the host namewww.companypro.net, you should use thenslookupcommand.

Command: nslookup

Target:www.companypro.net

So, the completed command is:

nslookupwww.companypro.net

nslookup: This command is used to query the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record. www.companypro.net: This is the domain name you want to query to obtain its

associated IP addresses.

References:

Using nslookup: nslookup Command Guide