- (Topic 3)
A customer hired a network consultant to install a new wireless network with the following specifications:
* 2.4GHz
* 11Mbps
* 20MHz
Which of the following standards best fits these requirements?
Correct Answer:
B
The 802.11b standard is a wireless networking protocol that operates in the 2.4GHz frequency band and supports a maximum data rate of 11Mbps. It uses a 20MHz channel width and a direct-sequence spread spectrum (DSSS) modulation technique2. The 802.11b standard was released in 1999 and is backward compatible with the original 802.11 standard3. The other standards do not match the specifications given by the customer. 802.11ac operates in the 5GHz band and supports higher data rates up to 6.9Gbps.
* 802.11g also operates in the 2.4GHz band but supports data rates up to 54Mbps. 802.11n can operate in both 2.4GHz and 5GHz bands and supports data rates up to 600Mbps. It also uses a wider channel width of 40MHz and a multiple-input multiple-output (MIMO) technology3.
References2 - 802.11 Standards Explained: 802.11ax, 802.11ac, 802.11b/g/n, 802.11a - Lifewire3 - Introduction to WLAN Frequency Bands | Engineering Education (EngEd …
- (Topic 3)
A company joins a bank's financial network and establishes a connection to the clearinghouse servers in the range 192 168.124.0/27. An IT technician then realizes the range exists within the VM pool at the data center. Which of the following is the BEST way for the technician to connect to the bank's servers?
Correct Answer:
A
- (Topic 1)
A technician is deploying a new switch model and would like to add it to the existing network monitoring software. The technician wants to know what metrics can be gathered from a given switch. Which of the following should the technician utilize for the switch?
Correct Answer:
A
To determine what metrics can be gathered from a given switch, a technician should utilize the Management Information Base (MIB). The MIB is a database of network management information that is used to manage and monitor network devices. It contains information about device configuration, status, and performance. References: Network+ Certification Study Guide, Chapter 5: Network Security
- (Topic 3)
A network engineer needs to change an entire subnet of SLAAC-configured workstation addresses. Which of the following methods would be the best for the engineer to use?
Correct Answer:
B
SLAAC (Stateless Address Autoconfiguration) is a mechanism that enables each host on the network to auto-configure a unique IPv6 address without any device keeping track of which address is assigned to which node12. SLAAC uses link-local addresses and the interface’s MAC address or a random number to generate the host portion of the IPv6 address2. SLAAC also relies on Router Solicitation (RS) and Router Advertisement (RA) messages to obtain the network prefix and other information from a router12. Therefore, to change an entire subnet of SLAAC-configured workstation addresses, the network engineer needs to change the address prefix in a router and let the router advertise the new prefix with an ND (Neighbor Discovery) message. This way, the workstations will receive the new prefix and update their IPv6 addresses accordingly3.
References1 - IPv6 Stateless Address Auto-configuration (SLAAC) | NetworkAcademy.io2 - IPv6 SLAAC – Stateless Address Autoconfiguration - Study-CCNA3 - Mastering IPv6
SLAAC Concepts and Configuration - Cisco Press
- (Topic 3)
A company is utilizing multifactor authentication for data center access. Which of the following is the MOST effective security mechanism against physical intrusions due to stolen credentials?
Correct Answer:
C
