CompTIA Cloud+ (CVO 001)

Explore the storage options available to cloud infrastructures and the file systems clients use to access cloud resources.

Explore disk storage systems for cloud solutions, covering storage configuration concepts, disk types, tiering, RAID and RAID levels, and file systems used by different operating systems.

Explore rotational media with spinning disks and read/write arms, and compare ATA/IDE, Serial ATA, SCSI, Serial Attached SCSI, and Fiber Channel, highlighting cost, speed, and scalability.

Drive access speed depends on rotational speed, as faster rotation lowers latency; at 3600 rpm it takes about 0.3 ms to locate data, and higher rpm further reduces latency.

Compare solid-state drives to hard disks, showcasing instant startup, no moving parts, low fragmentation, and quiet operation, while listing usb, flash, dvd, and tape storage options.

Tiering uses multiple storage types for data by lifecycle. Start with tier 1 on RAID 5 for mission-critical data, then move to cheaper online and offline archival guided by policies.

Explore RAID types from RAID 0's lack of fault tolerance to RAID 1 mirroring and hybrid RAID 0+1 and 1+0, noting parity, striping, and performance trade-offs.

Compare the six raid types, noting minimum drives and fault tolerance. Show efficiency: raid 0 uses all disks; raid 1+0 uses half; raid 5 and 6 use (drives minus one)/drives.

Explore common storage file systems used to access cloud storage, from Unix root and directories to FAT, NTFS, VM, and Z4. Compare their capacity limits, encryption availability, and resizing options.

Explore the forms of storage used in cloud environments. Learn how storage networking connects client machines to shared storage in cloud infrastructure.

Explore networking storage in the cloud by comparing network attached storage, direct storage, and storage area networks. Examine access protocols, provisioning, zoning, and the management of storage networking.

Learn about three storage technologies: direct attached storage, storage area networks, and network attached storage, covering block and file level access, LUNs, host bus adapters, and IP network connectivity.

Explore fiber channel's role in high-performance storage networks with rates up to 10 gig. Identify topologies—point-to-point, arbitrated loop, switched fabric—and how scsi commands or ip are used.

Fiber channel protocol enables communication on the fiber channel network, transports SCSI commands, uses start, data, and end of frame markers, and employs offload engines with ethernet encapsulation via fcoe.

Explore ethernet technology, delivering speeds up to 10 gigabits per second, limited by cable length and type; operate as a layer 2 protocol using frames, with cables reaching 100 meters.

Learn how iSCSI encapsulates scuzzy commands in IP packets, sending data across a layer 3 IP network over Ethernet to a network attached storage device, using the regular data network.

Discover storage provisioning with iSCSI, where an application server acts as the initiator and connects to targets that present allocated storage as virtual disks.

Explore how storage resources become network shares that appear as folders on local machines, using server message block on Microsoft systems and the network file system on Linux.

Learn how zoning isolates storage resources and controls access by hardware-level rules on a fiber channel switch, distinguishing port-level hard zoning from broader soft zoning to manage controller access.

Implement LUN masking at the storage controller level. Provide access to specific LUNs (for example 1:0 and 1:3) while enabling port-level sharing.

Explore multipathing to create redundancy in a storage network, enabling fault tolerance and performance gains through multiple host bus adapters and switch-to-storage connections to the storage array.

Examine basic networking concepts in virtualised cloud environments and compare them to physical networks. Learn about different network types and the protocols that keep networks functional.

Explore networking concepts for cloud and virtual infrastructures, covering implementing network configurations, NAT, QoS for optimization, and protocols, ports, topologies, plus DNS and DHCP.

Explore the three main network types: the internet, the corporate network behind the firewall, and an extranet for securely exposing resources like web, FTP, and e-mail servers to outsiders.

Explore classic network topologies, including bus, ring, star, mesh, and tree, highlighting fault tolerance, single points of failure, and when to use partial or full mesh designs.

Improve network bandwidth and reduce latency by using data compression, caching, and load balancing; compressed data is decompressed at the destination, and requests are distributed across servers.

Learn how routers and switches enable network communication: switches operate at layer 2, forwarding frames by MAC addresses within the same layer 3 network, while routers connect different networks.

Use private IP addresses inside your network and translate them to public IPs via NAT; private ranges include class a, b, c, and 169 range with automatic private IP addresses.

Understand how network address translation translates private ip addresses to public ip, uses a table to route responses, and enables devices to share public ip via port address translation.

Explore how IP addresses identify devices, how subnetting creates /25 subnets from class a or b networks by borrowing a host bit, and how supernetting reduces routing table size.

Understand how routers build routing tables, view them with the ip route command, and forward packets using next hops such as 10.1.1.2 and 10.1.1.1, plus a default route to 10.1.1.3.

Explore how VLANs separate networks at Layer 2 by assigning switch ports to VLANs and using trunk links with 802.1Q tagging to enable inter-switch communication, while routers handle inter-VLAN routing.

Learn how network protocols use port numbers to enable communication, from standard ports like 80 and 443 to registered and dynamic ports, including ftp 20/21, ftps 989/990, and sftp 22.

Learn how the DNS resolves web addresses through a hierarchy of root, top-level, and domain-level servers, from local to authoritative IPs for destinations.

Explore how DHCP automates IP address, subnet mask, and gateway assignment via a four-step client‑server exchange—discover, offer, request, and acknowledge (broadcast on the local network).

Learn how simple mail transfer protocol enables email transmission between servers. Explore client protocols like pop3 and imap for retrieving mail, and how smtp enables inter-server delivery.

Learn essential port numbers for the exam and real world, including 21, 22, 23, 25, 53, 80, and 443, and note the bootstrap protocol and DNS port usage.

Explore virtualization concepts within a cloud environment by examining a hypervisor and the types of hypervisors used to provide a virtualized environment.

Examine virtualization components and hypervisor types, comparing type 1 and type 2, and differentiate consumer and enterprise virtualization products. Explore virtual network cards, virtual host bus adapters, and storage virtualization.

Explore how a hypervisor manages virtual environments, creates and starts guest machines, and shares host resources. Distinguish type 1 bare-metal hypervisors from type 2 hosted hypervisors.

Differentiate virtualization products by proprietary versus open source licensing, noting Hyper-V and licensed options, open source tools without pay, Type 1 enterprise vs Type 2 consumer hypervisors, and virtual networks.

Identify the virtualization host as the physical device that runs the hypervisor and ensure hardware assisted virtualization is enabled in the BIOS, upgrading firmware if needed for full support.

Understand cpu speed and cores and how memory affects allocation. Explore virtualization with virtual cpus, oversubscription concepts, and why memory planning is vital.

Choose server-class network interface cards to support many virtual machines on a virtual network, enabling tcp offload, tcp segmentation offload, jumbo frames, and 64-bit memory access.

Compare VMware, Hyper-V, and XenServer from Citrix on host memory, virtual machines, RAM, and network card limits.

Understand virtual machine components by examining fixed/thick, dynamic/thin, and differencing disks and their impact on host space and performance. Configure virtual network cards for isolation or bridging.

Create a virtual network using software-based virtual switches and routers. Use standard switches for devices on a single host, or distributed switches shared across hosts.

Manage virtual machine memory by dynamically adjusting allocations within host limits, planning for both VM and host requirements, and choosing static or dynamic allocation with min and max bounds.

Explain memory limits for virtual machines across Hyper-V, VMware, and Citrix, up to 1 terabyte, with platform-specific caps, and summarize disk handling (SCSI/IDE), XBD devices, and per-VM NIC limits.

Virtualize storage by grouping devices into a single unit shared by virtual machines, enabling shared storage and inport ID virtualization for multi-host fiber channel SAN access.

Enable guest tools on the guest operating system within each virtual machine to enable copy-paste between host and guest, improve graphics and network performance, and synchronize time.

Explore essential maintenance tasks in a virtual environment and learn how to migrate resources from physical to virtual environments.

Explore virtualization and the cloud, covering managing virtual machines and devices, importing and exporting VMs, virtual resource migration from physical to virtual and across cloud environments, and cloud benefits.

Virtualization in the cloud enables elasticity through dynamic compute and memory allocation to match workloads, and supports isolation of networks and apps for testing and security.

Explore migrating virtual machines across environments and speed VM creation using preconfigured virtual machine templates. Templates provide ready hardware and software settings to base new VMs on, reducing initial setup.

Migrate a physical server to a virtual machine by imaging and deploying it on a host, using enterprise tools with manual or automated options, online or offline.

Describe virtual to virtual migration from a local virtualization environment to a cloud based virtual environment and virtual to physical migration of a VM image to a physical host.

Use the cloning technique to create a VM clone that mirrors an existing VM. The clone and original have distinct MAC addresses and UUIDs, so changes don't affect either image.

Migrate a vm from one storage mechanism to another, enabling automated storage migration that keeps the vm available for the end user by migrating to another storage device or host.

Assess host and vm requirements and monitor physical servers for resource sizing. Remove unneeded files, apply os patches, plan maintenance windows, and disconnect the network to avoid duplicates during migration.

Explore network management by examining protocols and services that extract information from devices on your network, including SNMP and syslog, and how some management protocols also send configurations.

Learn network management through resource monitoring techniques to collect device information, apply windows management and infrastructure framework, and establish baselines and thresholds with remote access tools for hypervisor management.

Explore snmp, a standard network management protocol that queries devices via a manager and agent, organizing data in a hierarchical MIB with object IDs and traps for thresholds.

Syslog management protocol centralizes device event messages by sending them from various devices to a central server, turning local logs into network-wide insights.

Explore Windows management instrumentation, a Microsoft standard to extract hardware and software information from devices for analysis or central collection, using managed objects, providers, and an object manager.

Explain the WBEM management protocol and its Microsoft WMI implementation, detailing the architecture with device resources, providers, and the object manager, and how management applications pull information via the API.

Explore how the intelligent platform management interface standard enables out-of-band management with serial or console connections to remotely roll out BIOS settings when network access is unavailable.

Establish baselines of normal resource usage for each device to benchmark monitoring data, and set thresholds to trigger alerts and automate responses when capacity is reached.

Learn to remotely manage the hypervisor, using console port with serial connection, a web interface, secure shell, and Remote Desktop Protocol, and compare command-line versus GUI tools for virtualization management.

Manage resources in a virtual environment to optimize performance. Learn how to allocate compute resources to virtual machines and assign them correctly to the OEMs and the host.

Learn performance tuning by allocating host resources to EMS and virtual machines, using resource pools and physical-to-virtual mappings, while diagnosing and optimizing host performance with iops, caching, throughput, and bandwidth.

Explore how host resources—memory, CPU, network, and disk—are allocated to virtual machines using quotas, soft and hard limits, reservations, and resource pools.

Vendor-specific algorithms decide quotas, limits, and reservations across hypervisors; testing reveals how dynamic allocation affects host processing power, with manual allocations sometimes preferable, while limits define ceilings or floors.

Redirect the host's physical ports to the virtual machine to enable usb passthrough, configuring it in the hypervisor's networking section; only one vm can use it at a time.

Understand nested resource pools, where a parent allocates resources to child pools, and dynamic allocation keeps limits and quotas in check while redistributing idle resources to a busy VM.

Explore memory performance optimization through ballooning to reclaim guest memory. Learn how balloon driver shifts guest memory to the hypervisor and why swap files matter.

Learn how cpu time and wait time affect an application's threads. Understand how a host's queue of jobs manages processing, and why high wait time signals adding processors or cores.

Improve disk performance by choosing between rotational and solid-state media, noting cost and speed differences, and implement a raid configuration to maintain data access after a drive failure.

Explore disk terminology: reading and writing operations, storage tiers (online, offline, backup tapes), and dynamic allocation across the data lifecycle, with disk latency and throttling shaping virtual machine performance.

Mitigate disk issues by deploying disk arrays to keep data accessible after drive or controller failures, back up data to guard against corruption, and deploy multiple paths to storage network.

Learn about memory issues in enterprise virtualization, including ram failures, replacing bad memory while maintaining enough ram, and how host clusters migrate virtual machines and disk arrays expand swap space.

Mitigate network issues by deploying multiple physical NICs and redundant paths. Manually configure speed and duplex to prevent degradation from mismatches and ensure alternative switches and cables remain available.

Ensure proper installation of the CPU, protect against voltage spikes with surge protectors, and maintain proper temperature to prevent overheating; use multiple physical processors to tolerate a failed unit.

Explore disk performance with iops, file system choices, and metadata handling, and examine caching for faster data access and network concepts like bandwidth, throughput, latency, and scalability.

Learn to manage virtual machine resources by configuring memory, hard drives, and network adapters, and adjust settings such as dynamic versus fixed storage and processor allocation.

Explore system management in the virtual environment by applying policies and procedures to capacity planning, configuration change management, and network resource allocation.

Develop and implement policies and procedures for cloud and network environments, covering planning, documentation, change management, configuration and capacity management, and the systems lifecycle using standardized models.

Create policies and procedures to guide day-to-day network activities, emphasize change management to minimize disruption, document changes, assess and research risks, and apply configuration management as a change control subset.

Follow a structured change management process from a request for change to a change proposal and type, engaging the Change Advisory Board to assess benefits, risks, resources, and timelines.

Identify every configuration item and control its execution to ensure changes are made correctly and in the right order, while documenting changes for a proper configuration management system.

Gain a better understanding of configuration items past and future to base informed decisions. Reduce mistakes, backouts, and outages while improving compliance, cost visibility, and tracking.

Identify each configuration item as a single change and use a consistent naming convention; record details in a CMDB or spreadsheet and enforce change management with periodic audits.

Capacity management forecasts needs and detects issues before they arise to preserve performance. It guides units to describe capacity needs and ensures resources to meet SLAs.

Explore ITIL's five-phase lifecycle—service strategy, design, transition, implementation, and continuous service improvement—and contrast it with the Microsoft operations framework's circular planning, delivering, operating cycle for continual improvement.

Document everything, standardize processes, and plan thoroughly to ensure successful lifecycle management across models, enabling lessons from the past, consistency, and better network control.

Explore how to test cloud deployments after moving resources from physical to cloud environments, ensure functionality mirrors the physical setup, and learn essential troubleshooting techniques for the virtual environment.

Explore module 10 on testing and troubleshooting by testing basic connectivity between devices, stressing network documentation, and applying appropriate testing techniques to verify cloud environment functionality and security testing.

Execute configuration testing to verify cloud performance, focusing on latency, bandwidth, and baselines. Test throughput with CPS and Perf, confirm cloud-data center sync, validate apps, storage, failover and failback.

Learn how security testing in cloud and virtual environments identifies vulnerabilities, with white box and black box approaches, and when to inform the cloud provider.

Define roles and responsibilities to protect test integrity and ensure separation of duties. Implement checks and balances and apply least privilege so testers have only the rights needed.

Master ping as a core testing tool for connectivity between two devices across physical and virtual networks, using ICMP echo requests and replies to verify bidirectional reachability.

Trace route, or tracert, reveals the path to a destination by ICMP packets through each hop, showing device names, IP addresses, and traversal times.

Use ipconfig to view a computer's network configuration, including the IPv4 address, subnet mask, default gateway, and the IPv6 link-local address.

Explore how the ifconfig command reveals a device's IP configuration, including MAC address, IPv4 address and subnet mask, and IPv6 link-local details.

Use nslookup to troubleshoot DNS, identify your current DNS server, and distinguish between authoritative and non-authoritative answers to verify DNS name resolution.

Run netstat to display current active connections, showing local ip, foreign addresses, and any resolved forwarding names or ips, plus established sessions revealing where the computer connected.

Use arp -a to view the ARP cache, revealing IP to MAC mappings learned by connections, pings, or from other devices, with static and dynamic entries including multicast addresses.

Learn how telnet establishes a command-line session to a remote device, prompts for username and password, and connects you to a router's command line.

Keep comprehensive network documentation that reflects device configurations and updates after every change to streamline troubleshooting. Use system logs to analyze events and diagnose issues.