Intro to Networking

Why is it important to minimize cable clutter in a rack?

Helps prevent airflow blockages that can cause heat/ debri build up

STP (Shielded twisted-pair cable)

Helps protect against EMI and RFI. Compare to UTP.

What is the unit of measurement that defines the space available in a rack? How tall are standard racks?

RU, U, 42U

Give three examples of networked devices that are not computers.

Routers, Switches, NICs

Plenum

The area above the ceiling tile or below the subfloor in a building.

Patch Management

The practice of monitoring for, evaluating, testing, and installing software patches and updates.

System Life Cycle

The process of designing, implementing, and maintaining an entire network.

You've decided to run an Nmap scan on your network. Which apps could you open to perform this task? Choose all that apply. Zenmap Microsoft Edge Command Prompt PowerShell

Zenmap, Command Prompt, PowerShell

What command invokes Nmap at a command line?

Zenmap?

Which network diagram shows a logical topology? a. Rack diagram b. Network map c. Floor plan d. Wiring diagram

b. network map

wiring diagram

graphical representation of a network's wired infrastructure

Why is it important to use a structured cabling standard when installing and managing cabling systems?

helps keep things organized & prevents human error & downtime

Rollback

is the process of reverting to a previous version of software after an attempt to patch or upgrade it fails.

What type of diagram shows a graphical representation of a network's wired infrastructure? Rack diagram Wiring diagram Network map Network topology

wiring diagram

SIP (Session Initial Protocol)

A common application layer protocol used by voice gateways to initiate and maintain connections

Nmap

A network utility designed to scan a network and create a map. Frequently used as a vulnerability scanner.

patch cable

A relatively short section (usually between 3 and 25 feet) of cabling with connectors on both ends.

UTP (Unshielded Twisted Pair)

A type of twisted pair cabling that does not include shielding around its conductors.

demarc (demarcation point)

Device that marks where a telecommunications service provider's network ends and the organization's network begins

Which change management principle must you apply to all changes regardless of scope or impact?

Document the change

According to structured cabling standards, there must be at least one __________________________________ on each floor.

IDF

Krone tool

Punchdown tool

bend radius

The radius of the maximum arc into which you can loop a cable before you will cause data transmission errors. Generally, a twisted pair cable's bend radius is equal to or greater than four times the diameter of the cable.

In which life cycle phase is an old device removed from the network?

c. implementation

voice gateway device

converts signals from a campus's analog phone equipment into IP data that can travel over the Internet, or which converts VoIP data from an internal IP network to travel over a phone company's analog telephone lines.

You need to connect a new network printer to a nearby wall jack. What kind of cable should you use?

patch cable

What are some elements that are typically included in network diagrams?

physical layout, logical topology, perimeter, access method, protocols, and network devices and connections.

If you're shopping for a rack switch, what component on the switch tells you it can be mounted to a rack?

rack ears

Inventory Management

refers to the monitoring and maintaining of all assets that make up a network.

In a large organization, how do you typically request permission to perform a network change?

submit a change request document, then understand and follow the approval process, have the change project-managed, provide additional documentation, and close the change.

When an Internet connection goes down, what business document defines a customer's options for paying a reduced rate?

(SLA) Service level agreement

MSA (master service agreement)

A contract that defines terms of future contracts.

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.

RFP (Request for Proposal)

A document that is sent out to potential vendors requesting them to provide a proposal on a product or service.

rack diagram

A drawing that shows the devices stacked in a rack system and is typically drawn to scale.

patch

A general software security update intended to cover vulnerabilities that have been discovered.

network diagram

A graphical representation of a network's devices and connections.

IDF (intermediate distribution frame)

A junction point between the MDF and concentrations of fewer connections—for example, those that terminate in a telecommunications closet.

rack

A large data room can contain rows of racks to hold various network equipment, such as servers, rout- ers, switches, and firewalls. Rack systems make good use of space in data rooms and ensure adequate spacing, access, and ventilation for the devices they house.

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 technician from your ISP has arrived to help you troubleshoot a weak WAN connection. To what location do you take them?

EF (entrance Facility)

Which of the following causes physical layer failures? a. SCADA b. PVC c. STP d. EMI

EMI (electromagnetic interference)

EMI

Electromagnetic interference. Interference caused by motors, power lines, and fluorescent lights. Cables can be shielded to protect signals from EMI. Additionally, EMI shielding prevents signal emanation, so it can prevent someone from capturing network traffic.

MLA (master license agreement)

Grants a license from a creator, developer, or producer to a third party for the purposes of marketing or sublicensing, or distributing the product to consumers

Why is it important to use plenum-rated cabling in the area above the ceiling tile?

It's flame resistant & has less smoke than regular cables

What is the first step of inventory management? Interview users. Identify network requirements. List an administrative account's username and password for each device on a network. List all components on the network.

List all components on the network

A transceiver was recently damaged by a lightning strike during a storm. How might you decide whether the ISP is responsible for replacing this device, or whether your company must foot the bill?

Look at whether the device is located on the ISP's side of the demarc.

Which of the following devices are you likely to find in the MDF? Choose all that apply. Routers Switches Network printer KVM switch

Routers, Switches, KVM switch

Industrial Control Systems (ICS)

Systems that collect, monitor, and process real-time data to control machines locally or at remote sites.

(EF) Entrance Facility

This is the location where an incoming network, such as the Internet, connects with the school or corporate network and includes all the necessary components to make the transition from the WAN or MAN managed by the ISP (Internet service provider) to the LAN or CAN managed by the customer.

How can you go about gathering the information needed to assemble a thorough operations manual?

Visits to data rooms, an examination of servers and desktops, a review of receipts for software and hardware purchases, and the use of a protocol analyzer or network management software package

Which device converts signals from a campus's analog phone equipment into IP data that can travel over the Internet?

VoIP gateway

VoIP telephone equipment—VoIp (Voice over Ip)

also known as IP telephony, is the use of any network (either public or private) to carry voice signals using TCP/IP protocols

SOW (statement of work)

documents in detail the work that must be completed for a particular project, and includes 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. Many times, an SOW is used to define the terms of each new project as an addendum to an existing MSA.

Crosstalk

interactions between different signal transduction pathways

For what time period should you schedule a network change?

off-hours

Which of these is considered a secure place to store a list of documented network passwords? The CEO's smartphone A sticky note under the keyboard A password manager The MDF

password manager

Which change is designed to close a security vulnerability without affecting other components of an application?

patch

These standards, now known as______________ , or structured cabling, describe uni- form, enterprise-wide cabling systems regardless of who manufactures or sells the various parts used in the system.

ANSI/TIA-568

data room

Also called TR (telecommunications room), TE (telecommunications enclosure), or data closet, a data room is an enclosed space that holds network equipment.

Patch Panel

Also called a patch bay, this is a panel of data receptors which can be mounted to a wall or a rack and which provides a central termination point when many patch cables converge in a single location.

MDF (main distribution frame)

Also known as the main cross connect, the first point of interconnection between an organization's LAN or WAN and a service provider's facility. AKA equipment room

fiber-optic cable

Cable that uses light guided through thin glass tubes, instead of electrical signals, to transmit data. It is very fast but also expensive.

Horizontal Cabling

Cabling that extends out from the telecommunications closet into the LAN work area

Backbone Cabling

Cabling that interconnects telecommunication closets, equipment rooms, and cabling entrances in the same building and between buildings.

1. At what point does the ISP hand over responsibility to the customer?

Demarc