BC CompTIA Network+ Mod 7 HW
Which type of switch connects all devices in a rack to the rest of the network? ToR switch EoR switch Spine switch Core switch
ToR switch A ToR (top of rack) switch connects all other devices in the rack to the rest of the network. EoR (end of row) switching places several leaf switches in a rack at the end of each row of racks. Core switches are highly efficient multilayer switches that support the network's backbone traffic. Similarly, spine switches organize traffic and network segments using OSI layer 3 technologies.
When shopping for a new router, what does the MTBF tell you? -How long devices like this one will last on average until the next failure -How long until that device fails -How long it will usually take to repair that device -How much it will cost to repair that device
How long devices like this one will last on average until the next failure MTBF (mean time between failures) indicates how long devices like this one will last before the next failure is expected to occur. No one can predict when a specific device will fail. The cost of repairs to a device can only be calculated once the problem is identified. MTTR (mean time to repair) calculates the average amount of time required to repair a device.
What software allows you to define VMs and manage resource allocation and sharing among VMs on a host computer? SDN (software-defined networking) NFV (Network Functions Virtualization) Hypervisor Terminal emulation
Hypervisor A hypervisor creates and manages a VM and allocates hardware resources for the host and any of its guest VMs. NFV (Network Functions Virtualization) is the merging of physical and virtual network architecture. SDN (software-defined networking) is a centralized approach to networking that removes most of the decision-making power from network devices and instead handles that responsibility at a software level. Terminal emulation, also called remote virtual computing, allows a remote client to take over and command a host computer.
Which device can manage traffic to multiple servers in a cluster so all servers equally share the traffic? Firewall Load balancer Switch Router
Load balancer A load balancer helps to evenly distribute traffic to each device in a server cluster so every device carries a portion of the load. A router uses logical addressing information to direct data between two or more networks and can help find the best path for traffic to get from one network to another. A firewall selectively filters or blocks traffic between networks. A switch logically subdivides a network into smaller, individual collision domains.
What information does the switchport port-security command use to restrict access to a switch's interface? Broadcast address IP address MAC address Port number
MAC address The switchport port-security command restricts the number of MAC addresses per port and stores acceptable MAC addresses in a table that can be configured manually or dynamically. Firewalls filter traffic by port number or IP address. A broadcast address is used for managing broadcast traffic on a network.
With which network connection type does the VM obtain IP addressing information from its host? Isolation mode NAT mode Managed mode Bridged mode
NAT mode In NAT (network address translation) mode, a VM obtains IP addressing information from its host rather than from a server or router on the physical network. Although a bridged vNIC communicates through the host's adapter, it obtains its own IP address, default gateway, and subnet mask from a DHCP server on the physical LAN. Isolation mode is not a network connection type but is related to the way a VM gets access to host resources separately from other guests. Managed mode is not a network connection type.
Which cloud management technique executes a series of tasks in a workflow? Orchestration IaC SLA Automation
Orchestration Orchestration allows the automation of many individual tasks to work together in a robust workflow. Automation is a programmed, computer-generated response to a specific event. IaC (infrastructure as code) is the process of using text-based commands in a computer-readable configuration file to create and manage cloud resources. An SLA (service-level agreement) defines service standards, such as availability.
Which cloud service model gives software developers access to multiple platforms for testing code? XaaS IaaS SaaS PaaS
PaaS PaaS (Platform as a Service) provides a platform on which to test or run code without having to manage the underlying server. IaaS (Infrastructure as a Service) provides virtual hardware services, including network infrastructure devices such as virtual servers and DNS services. SaaS (Software as a Service) consists of applications provided through an online user interface that are compatible with a variety of devices and operating systems. XaaS (Anything as a Service) emphasizes the ability of the cloud to provide any combination of functions depending on a client's exact needs.
Which of the following features of a network connection between a switch and server is not improved by link aggregation? Speed Availability Bandwidth Fault tolerance
Speed Link aggregation isn't about speed of network traffic so much as bandwidth, fault tolerance, and resource availability.
What virtual, logically defined device operates primarily at the data link layer to pass frames between nodes? Virtual router Virtual switch Virtual firewall Virtual load balancer
Virtual switch A vSwitch (virtual switch) or bridge is a logically defined device that operates at the data link layer to pass frames between nodes. NFV (Network Functions Virtualization) provides flexible, cost-saving options for many types of network devices, including virtual routers, virtual load balancers, and virtual firewalls.
