Computer Networking Unit 2
environmental and security monitoring
Due to the sensitive nature of the equipment mounted on racks, these are critical preventive measures
rack width
Equipment racks come in a standard 19-inch frame, meaning that the front is 19 inches wide. You might also come across 23-inch racks.
virtual SATA optical disk
Installation media used in the lab was installed as the...?
Zenmap
-a program for detecting, identifying, and monitoring the device on your network -allows users to use a GUI, which is compatible with most OS.
MSA (master service agreement)
A contract that defines terms of future contracts.
VoIP PBX (private branch exchange)
A dedicated telephone switch or a virtual switching device that connects and manages calls within a private organization, and manages call connections that exit the network through a VoIP gateway.
MOU (memorandum of understanding)
A document presenting the intentions of two or more parties to enter into a binding agreement, or contract. The MOU is usually not a legally binding document (although there are exceptions), does not grant extensive rights to either party, provides no legal recourse, and is not intended to provide a thorough coverage of the agreement to come.
rack diagram
A drawing that shows the devices stacked in a rack system and is typically drawn to scale.
network diagrams
A graphical representation of a network's devices and connections.
upgrade
A significant change to an application's existing code, typically designed to improve functionality or add new features while also correcting bugs and vulnerabilities.
1
On host 10.0.0.254, how many ports were open?
up
On the details tab for your host, what was the state of the host?
Logical network topology
Refer to the picture. which of the following type of diagram is being depicted
Licensing Restrictions
The portion of a software license that limits what a product can be used for.
System Life Cycle
The process of designing, implementing, and maintaining an entire network.
system life cycle
The process of designing, implementing, and maintaining an entire network.
rollback
The process of reverting to a previous version of a software application after attempting to patch or upgrade it.
network diagram
A graphical representation of a network's devices and connections.
wiring schematic
A graphical representation of a network's wired infrastructure.
Statement 1 describes a logical network diagram while statement 2 describes a physical one
Refer to the following statements: This type of diagram depicts how devices are interconnected to each other using wires and cabbling2) This type of diagram depicts the arrangement of devices and how they communicate with each other. Which diagram types are being described?
patch cable
a relatively short (usually between 3 and 25 feet) length of cabling with connectors at both ends.
verify continuity
by using a cable tester to verify that each segment of cabling you install transmits data reliably you will be doing this
backbone cabling
consists of the cables or wireless links that provide interconnection between the entrance facility and MDF, and between the MDF and IDFs. One component of this is the vertical cross-connect, which runs between a building's floors
wall jacks
contain at least one voice and one data outlet
plenum cabling
if you do this make sure that the cable sheath is rated correctly for this. It is a coating with flame-resistant jacket that produces less smoke than regular
rack height
is measured in rack units (RU or U) with the industry standard being 42U tall—about 6 feet. Half-racks are usually 18U-22U tall.
racks
make good use of space in data rooms and ensure adequate spacing, access, and ventilation for the devices they house. -may be wall- or ceiling-mounted, freestanding on the floor, or bolted to the floor. Other features might include power strips, rack fans for cooling, cable trays, or drawers -
10
on your subnet, how many IPv4 addresses were scanned?
grounding
pay attention to these requirements and follow them religiously
horizontal cabling
the cabling that connects workstations to the closest data room and to switches housed in the room
Rack Depth
these depths vary considerably between manufacturers.
cable trays
use cable management devices such as these or brackets, braided sleeving, and furniture grommets
patch panels
use these to organize and connect lines. It does nothing to the data transmitted on a line other than pass the data along through the connection. They do help keep lines organized as they run from walls to racks to network devices, and they make it easy to switch out patch cables of variable lengths when devices are moved or changes
protect cables
you can do this by covering the cable with a protector or cover. When possible install through conduits and seal the ends to reduce risk of damage from pests or water.
ubuntu
Which linux distribution did you install in your lab tasks
data room
Also called data closet, data center, equipment room, or telecommunications room, a data room is the enclosed space that holds network equipment.
MDF (main distribution frame or main distribution facility)
Also known as the main cross connect, the centralized point of interconnection between an organization's LAN or WAN and a service provider's facility.
VoIP endpoint
An end user device or application that gives the user access to VoIP services on a network.
VoIP endpoints
An end user device or application that gives the user access to VoIP services on a network.
cinch cables loosely
By doing this, you will avoid squeezing the cables outer coverings which can lead to difficult-to-diagnose data errors.
-you can use color-coded cables for different general purposes. However, don't rely on the cable colors alone; use labels on ports or tags on cables to identify each cable's specific purpose -you can use color-coded cables for different general purposes. However, don't rely on the cable colors alone; use labels on ports or tags on cables to identify each cable's specific purpose -Where labels won't fit on the device itself, draw a simple diagram of the device that indicates the purpose of each port, slot, and connector -A portable label maker is indispensable for creating labels. Choose labels that are durable and that are designed to stick to plastic and metal, not paper. Keep your label maker handy in your toolbox as you work. Whenever you find a device, wall jack, or port not labeled and you are able to identify its purpose, take the time to label it correctly
What are some tips for labeling components?
-Process all changes through the proper channels -Minimize negative impacts on business processes -Plan thoroughly to maximize the chances of a successful change on the first attempt -Document each change throughout the process
What are the change management principles?
hardware and software
What are the two components of a computer system?
-submit a change request document -understand and follow the approval process -the change is project managed -provide additional documentation -close the change
What is the process for documentation management?
Wiring schematic
What type of diagram shows a graphical representation of a network's wired infrastructure?
documentation
-the best ways to have this is to keep your plant documentation in a centrally accessible location (it should include locations, installation dates, lengths, and grades of installed cable -Label every data jack or port, patch panel or punch-down block, connector, or circuit -Use color-coded cables for different purposes and record the color schemes -Be certain to update this as you make changes to the network. The more you do, the easier it will be to troubleshoot, move, or add cable segments in the future
patch management
The process of monitoring the release of new patches, testing them for use on networked devices, and installing them.
VoIP (Voice over IP)
The provision of telephone service over a packet-switched network running the TCP/IP protocol suite.
Patch cable
You need to connect a new network printer to a nearby wall jack. What kind of cable should you use?
demarc (demarcation point)
The point of division between a telecommunications service carrier's network and a building's internal network.
Inventory Management
The process of monitoring and maintaining all the assets that make up a network.
inventory management
The process of monitoring and maintaining all the assets that make up a network.
avoid EMI
you will be doing this if you can keep the cable at least 3 feet away from fluorescent lights, motors, power lines, televisions, copiers, or other source of electrical activity.
PVC (polyvinyl chloride)
A point-to-point connection over which data may follow any number of different paths.
iso
What was the file type of the installation file you used to install Ubuntu?
termination
When doing this to twisted-pair cabling, don't leave more than 1 inch of exposed (stripped) cable
MLA (master license agreement)
A contract that grants a license from a creator, developer, or producer, such as a software producer, to a third party for the purposes of marketing, sublicensing, or distributing the product to consumers as a stand-alone product or as part of another product.
patch
A correction, improvement, or enhancement to part of a software application, often distributed at no charge by software vendors to fix a bug in their code or to add slightly more functionality.
KVM (Keyboard, Video, and Mouse) switch
A device that connects the equipment in a rack to a single console to provide a central control portal for all devices on the rack.
VoIP gateway
A device that converts signals from a campus's analog phone equipment into IP data that can travel over the Internet, or that converts VoIP data from an internal IP network to travel over a phone company's analog telephone lines.
RFP (Request for Proposal)
A document requesting that vendors submit a proposal for a product or service that a company wants to purchase.
SOW (statement of work)
A document that details the work that must be completed for a particular project, including specifics such as tasks, deliverables, standards, payment schedule, and work timeline. An SOW is legally binding, meaning it can be enforced in a court of law.
fiber-optic cable
A form of cable that contains one or several glass or plastic fibers in its core. Data is transmitted via a pulsing light sent from a laser or LED (light-emitting diode) through the central fiber or fibers.
EIA (Electronic Industries Alliance)
A former trade organization composed of representatives from electronics manufacturing firms across the United States that sets standards for electronic equipment and lobbies for legislation favorable to the growth of the computer and electronics industries. EIA was dissolved in 2011 and its responsibilities transferred to ECA (Electronic Components, Assemblies, Equipment & Supplies Association), but the standards brand name, EIA, will continue to be used.
IDF (intermediate distribution frame)
A junction point between the MDF and concentrations of fewer connections— for example, those that terminate in a data closet.
SLA (Service Level Agreement)
A legally binding contract or part of a contract that defines, in plain language and in measurable terms, the aspects of a service provided to a customer. Specific details might include contract duration, guaranteed uptime, problem management, performance benchmarks, and termination options.A legally binding contract or part of a contract that defines, in plain language and in measurable terms, the aspects of a service provided to a customer. Specific details might include contract duration, guaranteed uptime, problem management, performance benchmarks, and termination options.
structured cabling
A method for uniform, enterprise-wide, multivendor cabling systems specified by the TIA/EIA 568 Commercial Building Wiring Standard. Structured cabling is based on a hierarchical design using a high-speed backbone.
PVC (polyvinylchloride)
A point-to-point connection over which data may follow any number of different paths.
punchdown tool
A pointed tool used to insert twisted-pair wire into receptors in a punchdown block to complete a circuit.
Nmap
A scanning tool designed to assess large networks quickly and provide comprehensive, customized information about a network and its hosts.
TIA (Telecommunications Industry Association)
A subgroup of the former EIA that focuses on standards for information technology, wireless, satellite, fiber optics, and telephone equipment. EIA was dissolved in 2011 and its responsibilities transferred to ECA (Electronic Components, Assemblies, Equipment & Supplies Association), but the standards brand name, EIA, will continue to be used. Probably the best known standards to come from the TIA/EIA alliance are its guidelines for how network cable should be installed in commercial buildings, known as the "TIA/EIA 568-B Series."
STP (service-level agreement)
A type of copper-based cable containing twisted-pair wires that are not only individually insulated, but are also surrounded by a shielding made of a metallic substance such as foil.
STP (shielded twisted pair)
A type of copper-based cable containing twisted-pair wires that are not only individually insulated, but are also surrounded by a shielding made of a metallic substance such as foil.
UTP (Unshielded Twisted Pair)
A type of copper-based cable that consists of one or more insulated twisted-pair wires encased in a plastic sheath, which does not contain additional shielding for the twisted pairs.
crosstalk
A type of interference caused by signals traveling on nearby wire pairs infringing on another pair's signal.
EMI (electromagnetic interference)
A type of interference that can be caused by motors, power lines, televisions, copiers, fluorescent lights, or other sources of electrical activity.
110 block
A type of punchdown block designed to terminate Cat 5 or better twisted-pair wires and typically used to handle data connections rather than telephone connections. The numeral 110 refers to the model number of the earliest blocks.
66 block
A type of punchdown block designed to terminate telephone connections. The numeral 66 refers to the model number of the earliest blocks.
patch panel
A wall- or rack-mounted panel where cables converge in one location.
wiki
A website that can be edited by users.
bend radius
Each type of cable has a prescribed one of these, which is the radius of the maximum arc into which you can loop a cable without impairing data transmission. Be careful not to exceed it.
100
On host 10.0.0.254, how many total ports were scanned?
99
On host 10.0.0.254, howw many closed ports were shown?
Logical network topology
Refer to the exhibit. Which of the following type of diagram is being depicted?
Statement 1 describes a logical network diagram, while statement 2 describes a physical one
Refer to the following statements: This type of diagram depicts how devices are interconnected to each other using wires and cabling2) This type of diagram depicts the arrangement of devices and how they communicate with each other. Which diagram types are being described?
plenum
The area above the ceiling tile or below the subfloor in a building.
entrance facility
The location where an incoming network service (whether phone, Internet, or long-distance service) enters a building and connects with the building's backbone cabling.
work area
This area encompasses workstations, printers, and other network devices, and all the patch cables, wall jacks, and horizontal cabling necessary to connect these devices to a data room.
company standards and stock
To accomplish this, you or your network manager should specify standards for the types of cable used by your organization and maintain a list of approved cabling vendors. Also, keep a supply room stocked with spare parts so you can easily and quickly replace defective parts
-Use names that are as descriptive as possible (without giving away too much information to potential hackers) -Only include fields that are absolutely essential in identifying the device -Don't overcomplicate the name with useless or redundant information. -Pay attention to any established naming convention already in use by your employer. For example, existing acronyms for the various departments in your corporation are more recognizable for employees -Think big-picture-down-to-details when designing device name fields, such as starting with the building name, then floor, then data room number, then rack number. If your company has national locations or international locations, certain names may need to include codes for continent, country, state, city, and so on. Think in terms of "top-down" or "outside-in" and be consistent -Consider any security risks from the details you might include in your naming convention. Make sure naming and labeling information is stored behind locked doors and inside secure databases. Don't use names that identify the location (physical or digital) of sensitive information that might alert an attacker to a highly desirable target, such as customer credit c
What are some tips in naming your devices?
-The port number of the switch used -The network device on the other end of the link
When interconnecting a switch port to a patch panel, which of the following information should be documented according to best practices?
The port number of the switch used and the network device on the other end of the link
When interconnecting a switch port to a patch panel, which of the following information should be documented according to best practices?
virtual box
Which VMM was used in your lab tasks?
ubuntu desktop
Which ubuntu distribution wass installed in the lab tasks?
none
Whichports and services were filtered on our host?
-To manage the size of the equipment to fit into the rack -To determine the quantity of servers you need to purchase
You have been asked to set up a new data center. Before vou proceed with the actual setup, you need to create a rack diagram of an existing rack that you want to use. Which of the following could be the reason for you to create one such diagram?
to manage the size of the equipment to fit into the rack
You have been asked to set up a new data center. Before you proceed with the actual setup, you need to create a rack diagram of an existing rack you want to use. Which of the following could be the reason for you to create one such diagram?
Rack diagram
You need to highlight the location of physical servers and network devices mounted on standardized frames that are installed within a datacenter to a new colleague. Which of the following types of diagrams should you show?
rack diagram
You need to highlight the location of physical servers and network devices mounted on standardized frames that are installed within a datacenter to a new colleague. Which of the following types of diagrams should you show?
slack in cable runs
You should measure first, measure again, and always leave some of this in the cable run
