Users at a satellite office are experiencing issues when using videoconferencing.Which of the following should a technician focus on first to rectify these issues?
Answer(s): A
Quality of Service (QoS) should be the focus first because it is specifically designed to prioritize certain types of traffic, such as videoconferencing, over other types of traffic on the network. Videoconferencing requires consistent bandwidth and low latency for smooth performance. If QoS is not properly configured, video and audio packets might be delayed or dropped, leading to poor videoconferencing experiences.
A network administrator is trying to locate the switch interface a PC is connected to. The administrator accesses the local switch, pings the PC IP address, and then uses the command show arp.Which of the following commands should the administrator use next?
Answer(s): B
After using the show arp command to identify the IP address-to-MAC address mapping, the next step is to find which switch interface the PC is connected to. The show mac-address-table command will display the MAC address table of the switch, which contains the MAC addresses of devices connected to each interface. The administrator can then locate the MAC address of the PC in the table and identify the corresponding switch interface.
A user attempts to log in to a corporate website by utilizing a shortcut. The shortcut has been used many times before. The user then notices some discrepancies on the company website.Which of the following is most likely the reason for this issue?
Answer(s): C
DNS poisoning occurs when a malicious actor manipulates the DNS cache to redirect a user's traffic to a fraudulent website, often one that appears similar to the legitimate site. In this case, the user is trying to log in using a shortcut, and the discrepancies on the company website suggest that the traffic might have been redirected to a malicious site. DNS poisoning can result in the user being unknowingly directed to a fake website, where they may encounter altered content or be vulnerable to phishing attacks.
Which of the following is the correct order of components in a bottom-up approach for the three-tier hierarchical model?
In the bottom-up approach of the three-tier hierarchical model, the components are ordered as follows:1. Access layer This is the layer where end devices (like computers, printers, etc.) connect to the network.2. Distribution layer This layer aggregates the traffic from the access layer and provides policy-based connectivity and routing between different segments of the network.3. Core layer The core layer is responsible for high-speed, high-performance routing between different distribution layers and networks.This model ensures scalability, redundancy, and efficient traffic management in large networks.
A client with a 2.4GHz wireless network has stated that the entire office is experiencing intermittent issues with laptops after the WAP was moved.Which of the following is the most likely reason for these issues?
The most likely reason for the intermittent wireless issues in this scenario is excessive noise on the 2.4GHz band. The 2.4GHz frequency range is commonly used by various devices like microwaves, Bluetooth devices, and other electronics, which can cause interference and disrupt the wireless signal.When the wireless access point (WAP) was moved, it could have been positioned closer to sources of interference, leading to noise and signal degradation, which causes connectivity issues.
Which of the following SD-WAN features allows a router to be shipped directly to the installation site and does not require site-level configuration?
Zero-touch provisioning (ZTP) is a feature that allows a router or device to be shipped directly to the installation site, where it automatically configures itself without requiring manual site-level configuration. The device will retrieve its configuration from a centralized server or management system as soon as it connects to the network, simplifying deployment and reducing the need for on-site IT resources.
A network technician is troubleshooting network latency and has determined the issue to be occurring between two network switches (Switch10 and Switch11). Symptoms reported include poor video performance and slow file copying. Given the following information:Which of the following should the technician most likely do to resolve the issue?
Based on the output from the switches, we can see that Switch10 has an MTU value of 1600 bytes, while Switch11 has an MTU value of 1500 bytes. A mismatch in the MTU value between the two switches can cause fragmentation, which leads to performance issues, such as slow file transfers and poor video performance.To resolve this issue, the MTU value on Switch10 should be modified to match the 1500-byte MTU setting on Switch11. Ensuring the MTU values match across the network will prevent fragmentation and improve performance.
Which of the following types of routes will take precedence when building a routing table for a given subnet?
When building a routing table, static routes take precedence over dynamic routing protocols like BGP (Border Gateway Protocol), OSPF (Open Shortest Path First), and default routes. Static routes are manually configured by a network administrator and have a higher administrative distance than dynamic routes, meaning they will be preferred when both static and dynamic routes exist for the same destination.
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