An intermediate distribution frame (IDF) is a distribution frame in a central office or customer premises, which cross connects the user cable media to individual user line circuits and may serve as a distribution point for multipair cables from the main distribution frame (MDF) or combined distribution frame (CDF) to
The Main Distribution Frame (MDF) room serves as the demarcation point location for the building. It is the transitional point from the voice, data, and video building feed cables to intra-building backbone cable, which runs to each Intermediate Distribution Frame (IDF) room.
An intermediate distribution frame (IDF) is a free-standing or wall-mounted rack for managing and interconnecting the telecommunications cable between end user devices and a main distribution frame (MDF).
Cat 6 cable contains four pairs of copper wire and uses all the pairs for signaling in order to obtain its high level of performance. Other basic facts about Cat 6 cables include: The ends of a Cat 6 cable use the same RJ-45 standard connector as previous generations of Ethernet cables.
There must be at least one telecommunications equipment room (T-E-R) in a single-story building. For multi-story buildings, one T-E-R on the first floor (or basement) is required and at least one smaller telecommunications room (TR) is required on each floor above.
In telecommunications networks, a node (Latin nodus, 'knot') is either a redistribution point or a communication endpoint. A physical network node is an electronic device that is attached to a network, and is capable of creating, receiving, or transmitting information over a communications channel.
When you connect two devices of different types together, you use a straight through cable. When you connect two devices of the same type together, you use a crossover cable. If you insert a network device between two devices of the same type, all cables are straight through.
A patch panel in a local area network (LAN) is a mounted hardware assembly that contains ports used to connect and manage incoming and outgoing LAN cables. Patch panels are also referred to as patch bays, patch fields or jack fields and are also commonly used in radio and television.
Under what circumstance might you use an Ethernet loopback plug? Switches are slowly being replaced by hubs, which are newer technology.
Ch 15 RQ
| Question | Answer |
|---|
| Which tool can help you find out which wall jack connects to which port on a switch in an electrical closet? | Loopback plug |
| Name two places where you might find a keystone RJ45 jack in a building. | In a patch panel in the network closet and in a RJ45 wall jack |
A patch cable is normally made of coaxial cabling, but it also could consist of fiber optic, shielded or unshielded CAT5/5e/6/6A, or single-conductor wires. A patch cable always has connectors on both ends, which means it's not as permanent of a solution as some cables like pigtails or blunt patch cords.
7 Advantages of Fiber Optic Cables Over Copper Cables
- Greater Bandwidth. Copper cables were originally designed for voice transmission and have a limited bandwidth.
- Faster Speeds. Fiber optic cables have a core that carries light to transmit data.
- Longer Distances.
- Better Reliability.
- Thinner and Sturdier.
- More Flexibility for the Future.
- Lower Total Cost of Ownership.
Infrared. Nearly all of the optical methods used for networking use infrared (IR) light. Two types of IR-based wireless network methods are used: diffused IR and point-to-point IR. Diffused IR bounces signals off walls, ceiling and floors.
Cards
| Term Which of the following is a common characteristic of a networking medium (choose all that apply)? a. bandwidth rating b. interference susceptability c. broadband rating d. max segment length | Definition a, b and d |
|---|
| Term How many strands of fiber optic cable are needed for a network connection | Definition 2 |
Patch panels are the 'unsung heroes' of the data center. When you need to connect a large number of devices to a central server, switch, or other piece of hardware, it is important that you plan everything out properly.
Disadvantages for a fiber optic cable are that they are very expensive, difficult to work with, and special training is required to attach connectors to cables. and must be polished to ensure that light is passed on from one cable to the other.
Wireless networks or WiFi (as wireless connections are commonly known) have a number of key business advantages over wired networks.
- Increased efficiency.
- Access and availability.
- Flexibility.
- Cost savings.
- New opportunities.
- Security.
- Installation problems.
- Coverage.
Star. The star topology is the most common topology in today's networks, and includes Ethernet, Fast Ethernet, and Gigabit Ethernet. Each node in a star topology connects to a dedicated link where the other end connects to a switch or hub.
Cards
| Term 1000BaseT Ethernet | Definition Supports 1000 Mbps Ethernet (usually called 'gigabit ethernet') Over category 5 or higher UTP cable using baseband signalling |
|---|
| Term Which topology most likely uses coaxial cabling? a. Physical star b. Logical ring c. Physical bus d. Logical switching | Definition c. Physical bus |
Wireless LAN Components
- User Devices. Users of wireless LANs operate a multitude of devices, such as PCs, laptops, and PDAs.
- Radio NICs. A major part of a wireless LAN includes a radio NIC that operates within the computer device and provides wireless connectivity.
- Access Points.
- Routers.
- Repeaters.
- Antennae.
The following sections discuss the types of cables used in networks and other related topics.
- Unshielded Twisted Pair (UTP) Cable.
- Shielded Twisted Pair (STP) Cable.
- Coaxial Cable.
- Fiber Optic Cable.
- Cable Installation Guides.
- Wireless LANs.
- Unshielded Twisted Pair (UTP) Cable.
From this article, we can know that a structured cabling system consists of six important components. They are horizontal cabling, backbone cabling, work area, telecommunications closet, equipment room and entrance facility.
It's the most common physical topology in LANs today. The arrangement of cabling and how cables connect one device to another in a network. The most common physical topology is a star, but bus, ring, point-to-point and mesh topologies are also used.
Fiber optic cables have a much greater bandwidth than metal cables. The amount of information that can be transmitted per unit time of fiber over other transmission media is its most significant advantage. An optical fiber offers low power loss, which allows for longer transmission distances.
Different types of backbone cable: Multimode optical fiber cable, Singlemode optical fiber cable,200-ohm balanced twisted-pair copper cable. What is horizontal cabling?
Backbone cabling is the inter-building and intra-building cable connections in structured cabling between entrance facilities, equipment rooms and telecommunications closets. Backbone cabling consists of the transmission media, main and intermediate cross-connects and terminations at these locations.
Under TIA/EIA-568-B, maximum allowable horizontal cable distance is 90 m of installed cabling, whether fibre or twisted-pair, with 100 m of maximum total length including patch cords.
Keep cable plant documentation in a centrally accessible location. Label data jacks or ports, patch panel or punch-down block, and connector or circuit. Then use colored cables that are identifiable by color to record their purposes and color schemes in documentation. Then update documentation as changes are made.
Hardware should be installed as close to the front of the rack as possible to allow for proper airflow in the back. Minimizing cable clutter can also help prevent airflow blockages. In a typical rack system, airflow through the chassis is typically designed to move from front to back.
Single-mode optical-fiber cable is commonly used as backbone cabling outside the building and is also usually the cable type for long-distance phone systems.
A collision occurs on your network when something happens to the data sent from the physical network medium that prevents it from reaching its destination. Mainly, it encounters another signal from another host on the network that yields a resulting useless signal on the network when the signals combine.
What statement accurately describes what a cable bend radius determines? -A cable bend radius is the radius of the minimum arc into which you can loop the cable without impairing data. -A cable bend radius defines the twist rate of the cable inside of the insulation.
What does a statement of work document do? a. It documents in detail the work that must be completed for a particular object, and includes specifics such as tasks, deliverables, standards, payment schedule, and work timeline.
