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Cisco Certified Support Technician (CCST) Networking 認定 100-150 試験問題 (Q18-Q23):

質問 # 18
HOTSPOT
You plan to use a network firewall to protect computers at a small office. For each statement about firewalls, select True or False.
Note: You will receive partial credit for each correct selection.

正解：

解説：

Explanation:
A firewall can direct all web traffic to a specific IP address.
True: Firewalls can be configured to perform Network Address Translation (NAT) and port forwarding, which can direct all web traffic (typically on port 80 and 443) to a specific internal IP address.
A firewall can block traffic to specific ports on internal computers.
True: Firewalls can be configured with access control lists (ACLs) or rules to block traffic to specific ports on internal computers, enhancing security by restricting unwanted or harmful traffic.
A firewall can prevent specific apps from running on a computer.
False: Firewalls typically control traffic flow and do not prevent specific applications from running on a computer. Application control is usually managed by endpoint security software or application control systems.
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.
Reference: Understanding Firewalls: Firewall Capabilities
Network Security Best Practices: Network Security Guide

質問 # 19
A help desk technician receives the four trouble tickets listed below. Which ticket should receive the highest priority and be addressed first?

A. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
B. Ticket 4: Two users report that wireless access in the cafeteria has been down for the last hour.
C. Ticket 3: A user reports that response time for a cloud-based application is slower than usual.
D. Ticket 1: A user requests relocation of a printer to a different network jack in the same office. The jack must be patched and made active.

正解：A

解説：
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

質問 # 20
What is the primary use of ICMP in network management?

A. Secure file transfer
B. Error reporting and diagnostics
C. Translating domain names to IP addresses
D. Assigning IP addresses

正解：B

質問 # 21
Which information is included in the header of a UDP segment?

A. Port numbers
B. Sequence numbers
C. IP addresses
D. MAC addresses

正解：A

解説：
The header of a UDP (User Datagram Protocol) segment includes port numbers. Specifically, it contains the source port number and the destination port number, which are used to identify the sending and receiving applications. UDP headers do not include IP addresses or MAC addresses, as those are part of the IP and Ethernet frame headers, respectively. Additionally, UDP does not use sequence numbers, which are a feature of TCP (Transmission Control Protocol) for ensuring reliable delivery of data segments1.
Reference: =
Segmentation Explained with TCP and UDP Header
User Datagram Protocol (UDP) - GeeksforGeeks
Which three fields are used in a UDP segment header
UDP Header: The header of a UDP segment includes the following key fields:
Source Port: The port number of the sending application.
Destination Port: The port number of the receiving application.
Length: The length of the UDP header and data.
Checksum: Used for error-checking the header and data.
IP Addresses: These are included in the IP header, not the UDP header.
Sequence Numbers: These are part of the TCP header, not UDP.
MAC Addresses: These are part of the Ethernet frame header and are not included in the UDP header.
Reference: RFC 768 - User Datagram Protocol: RFC 768
Cisco Guide on UDP: Cisco UDP Guide

質問 # 22
Which standard contains the specifications for Wi-Fi networks?

A. IEEE 802.11
B. EIA/TIA 568A
C. GSM
D. LTE
E. IEEE 802.3

正解：A

解説：
The IEEE 802.11 standard contains the specifications for Wi-Fi networks. It is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in various frequencies, including but not limited to 2.4 GHz, 5 GHz, and 6 GHz1. This standard is maintained by the Institute of Electrical and Electronics Engineers (IEEE) and is commonly referred to as Wi-Fi. The standard has evolved over time to include several amendments that improve speed, range, and reliability of wireless networks.
Reference: =
* The Most Common Wi-Fi Standards and Types, Explained
* 802.11 Standards Explained: 802.11ax, 802.11ac, 802.11b/g/n, 802.11a
* Wi-Fi Standards Explained - GeeksforGeeks

質問 # 23
......

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信頼できる100-150日本語版問題解説 &資格試験のリーダー &正確的な100-150合格対策

100-150合格対策、100-150難易度受験料

Cisco Certified Support Technician (CCST) Networking 認定 100-150 試験問題 (Q18-Q23):

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