Which of the following steps in the troubleshooting methodology comes after using a top-to-bottom examination of the OSI model to determine cause?
Answer(s): A
After using a top-to-bottom examination of the OSI model to determine the cause of a network issue, the next step in the troubleshooting methodology is to test the theory. This involves validating the hypothesis made about the problem's cause and verifying if the identified issue is indeed the root cause.
Which of the following would an adversary do while conducting an evil twin attack?
An evil twin attack involves an adversary setting up a rogue access point (AP) with the same SSID as a legitimate wireless network. The goal is to trick users into connecting to the malicious AP, thereby intercepting and potentially manipulating the data transmitted between the users and the network. Once connected to the rogue AP, the attacker may capture sensitive data or launch additional attacks, such as man-in-the-middle attacks.
An ISP provided a company with an IP range of 98.174.235.142/28. A network technician configured a router with a subnet mask of 255.255.255.224 and default gateway of 98.174.235.129. After the configuration was set up. the company is unable to connect to the ISP.Which of the following would resolve this issue?
Answer(s): D
The IP range provided by the ISP is 98.174.235.142/28, which gives a subnet with the network address of 98.174.235.128 and a range of IPs from 98.174.235.128 to 98.174.235.143 (usable IPs: 98.174.235.129 to 98.174.235.142). The router should be configured with an IP address in this range.The issue in this case is that the static IP address on the router is set to 98.174.235.129, which is the default gateway in the configuration, but this IP should not be used as the router's own IP. The router should have an IP address from the valid range of 98.174.235.128/28 that isn't used for the gateway (which is 98.174.235.129), so the correct IP would be 98.174.235.130 or any other available address in the range.
A network administrator is troubleshooting a connection between two switches that is experiencing intermittent errors. The administrator needs to determine which port on the remote switch the faulty cable is connected to.Which of the following is the best tool to use to identify the error?
Answer(s): B
LLDP (Link Layer Discovery Protocol) is the best tool for identifying which port on the remote switch the faulty cable is connected to. LLDP is a Layer 2 protocol used by network devices to advertise their identity, capabilities, and neighbors. By using LLDP, a network administrator can discover information about the devices connected to a switch port, including the port number on the remote switch.
Which of the following is a difference between EOL and EOS?
EOL (End of Life) and EOS (End of Support) are terms used in the lifecycle of a product, and they represent different stages:EOL (End of Life) refers to when a product is officially discontinued, meaning the manufacturer will no longer produce or sell the product. However, it may still offer support services such as software updates or security patches for a limited time.EOS (End of Support) refers to when the manufacturer stops offering any support for the product, including technical support, updates, or bug fixes. This typically happens after EOL.
A network architect is implementing an off-premises computing facility and needs to ensure that operation will not be impacted by major outages.Which of the following should the architect consider?
A hot site is an off-premises computing facility that is fully equipped and can take over operations immediately in the event of a disaster or major outage. It typically includes all necessary hardware, software, and data to ensure business continuity without any downtime. This option would ensure that operations are not impacted by major outages, as the hot site can provide immediate failover.
A network engineer is testing a website to ensure it is compatible with IPv6. After attempting to ping the website by its IPv6 address, the engineer determines that the DNS has not been set up properly.Which of the following should the network engineer complete to resolve this issue?
Answer(s): C
In IPv6, the AAAA record is used to map a domain name to its corresponding IPv6 address. If the network engineer is unable to ping the website by its IPv6 address and determines that the DNS is not set up properly, it is likely because the AAAA record, which links the domain to the IPv6 address, is missing or incorrectly configured.
A small coffee shop wants to set up multiple 2.4GHz wireless access points. The access points will support a large number of users, and the network technician wants to mitigate interference as much as possible.Which of the following is the number of 22MHz channels that the equipment can support?
In the 2.4GHz frequency band, there are 11 or 13 channels available, depending on the country. However, these channels overlap significantly, especially when using standard 20MHz channel widths. To minimize interference and maximize the number of non-overlapping channels, the 2.4GHz band can only support 3 non- overlapping channels when using 22MHz channel width.The non-overlapping channels in the 2.4GHz band are typically:Channel 1 (center frequency at 2412 MHz)Channel 6 (center frequency at 2437 MHz)Channel 11 (center frequency at 2462 MHz)Using these three channels (1, 6, and 11) allows you to avoid interference between channels. Increasing the number of channels or overlapping channels would result in interference and poor performance for wireless clients.Thus, 3 non-overlapping 22MHz channels are available in the 2.4GHz band.
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