Network Certification Quiz | IT Prep Test

The logical network diagram shows information about a network, including VLAN configurations. Baselines, regulations, and wiring schematics do not specifically provide details about VLAN setups.

Authentication is the process of verifying the identity of a network device or user before allowing them access to the network. This helps prevent unauthorized devices from sending traffic. Spanning, address translation, and mirroring are not directly related to preventing unauthorized devices from sending traffic.

Wireless routers can broadcast on several different channels, such as 1, 6, and 11, to minimize interference. In the case of two 802.11g access points in the same building, using channels 1 and 6 is the most effective way to minimize interference.

Electromagnetic interference (EMI) is the most likely cause of the network issue in this scenario as it can disrupt wireless signals. A short or open pair in the cabling may cause connectivity issues, but considering the situation described, EMI from nearby power lines is the primary culprit.

A patch panel separates the hardwiring of your network from your networking equipment. Each run of cable that goes throughout the house or building is punched down on the back of the patch panel.

STP cable refers to Shielded Twisted Pair cable, which provides protection against electromagnetic interference. RG-6, RG-59 are coaxial cables, which do not offer the same level of protection. Fiber cables, on the other hand, do not utilize twisted pairs for signal transmission.

A ping sweep (also known as an ICMP sweep) is a basic network scanning technique used to determine which of a range of IP addresses map to live hosts (computers). Ping sweeps are among the older and slower methods used to scan a network.

Netstat is a command-line tool that displays network connections, routing tables, and network interface statistics. It can help determine the listening port of a web server. Route, Ifconfig, and Nslookup are not typically used for this purpose.

A wireless router in a SOHO (Small Office / Home Office) network serves multiple functions such as routing network traffic, providing wireless connectivity, acting as a firewall, and often including features like DHCP server, NAT, and VPN support. Bandwidth shaper, proxy server, and load balancer are also network devices/services but typically serve more specialized functions compared to the multifunction capabilities of a wireless router in a SOHO setting.

The Exterior Gateway Protocol (EGP) is a now obsolete routing protocol for the Internet. BGP was created to replace the Exterior Gateway Protocol (EGP) protocol.

Convergence is part of the routing table update process. When a link fails or changes, updates are sent across the network that describe changes in the network topology. Each router then runs a routing algorithm to recompute routes and build new routing tables based on this information. Once all the routers in the network have updated their routing tables, convergence is complete. Convergence is a dynamic routing process as opposed to static routing. In static routing, an operator programs routes into routers. Static routing is appropriate for small networks or when dedicated links exist between networks.

Access points are devices commonly powered using PoE as it simplifies installation and reduces the need for separate power sources in areas where power outlets may not be readily available. Routers, switches, and laptops are typically powered using traditional power sources.

Port Mirroring generally indicates the ability to copy the traffic from a single port to a mirror port but disallows any type of bidirectional traffic on the port. Spanning Port usually indicates the ability to copy traffic from all the ports to a single port but also typically disallows bidirectional traffic on the port.

Address Resolution Protocol (ARP) is used for resolution of network layer addresses into link layer addresses, which is crucial in network communication. While nslookup, dig, and netstat are useful utilities for DNS lookup and network statistics, they do not specifically display a NIC's cache of MAC addresses.

A network bridge connects multiple network segments at the data link layer (Layer 2) of the OSI model. In Ethernet networks, the term bridge formally means a device that behaves according to the IEEE 802.1D standard. A bridge and a switch are very much alike; a switch being a bridge with numerous ports. Switch or Layer 2 switch is often used interchangeably with bridge.

Intrusion prevention systems are considered extensions of intrusion detection systems because they both monitor network traffic and/or system activities for malicious activity. The main differences are, unlike intrusion detection systems, intrusion prevention systems are placed in-line and are able to actively prevent/block intrusions that are detected. NIPS stands for Network Intrusion Prevention System.

The ICMP protocol operates at Layer 3 of the OSI model, which is the network layer responsible for packet forwarding and routing.

The most likely cause of the issue is the client being too far from the Access Point (AP), resulting in a weak or intermittent connection. This distance affects the signal strength and speed of the wireless connection.

Syslog is a standard for computer data logging and contains information regarding network device alerts using SNMP. Audit log, History log, and Ping sweep reports do not specifically contain SNMP information.

In this scenario, after creating an action plan and solution, the next logical step for the administrator would be to implement and test the solution to ensure that it resolves the intermittent connectivity problems.

The correct answer is netstat, as the command-line tool netstat lists routing tables. The other options are incorrect as they do not display routing tables.

In TCP/IP, the application layer contains all protocols and methods that fall into the realm of process-to-process communications across an Internet Protocol (IP) network. Application layer methods use the underlying transport layer protocols to establish host-to-host connections. TFTP, which stands for Trivial File Transfer Protocol, operates at the Application Layer (Layer 7) of the OSI Model.

A shared secret is a text string that serves as a password between a RADIUS client and RADIUS server.

Short for plain old telephone service, which refers to the standard telephone service that most homes use. In contrast, telephone services based on high-speed, digital communications lines, such as ISDN and FDDI, are not POTS. The main distinctions between POTS and non-POTS services are speed and bandwidth. POTS is generally restricted to about 52 Kbps (52,000 bits per second). The POTS network is also called the public switched telephone network (PSTN).

POTS (Plain Old Telephone Service) is commonly used to connect analog devices such as telephones to the Internet. The other options are not typically used for connecting analog devices.

Change management documentation is essential to track any changes made to the network or server environment, including upgrades. This documentation can provide insight into what changes were made, when they were made, and potential issues that arose during the upgrade process.

Common VPN transports include Remote Desktop Protocol (RDP) and Secure Socket Layer (SSL). Virtual Network Computing (VNC), Point-to-Point Tunneling Protocol (PPTP), and Remote Access Service (RAS) are not commonly used for VPN connections.

When a DHCP-configured client connects to a network, it sends a broadcast query to a DHCP server for necessary information such as IP address and configuration parameters. This process does not involve bridges, unmanaged switches, or firewalls.

After making any changes after logging into the router you should always note the changes by updating the configuration logs.