Why would the cost of purchasing more than one switch sometimes be the better choice than one switch?
A few long cable runs instead of many long cable runs
Describe the process of using redundancy in a switched network.
Add a second or more switches between nodes so that there is not a single point of failure
What are the three questions you should ask when selecting a switch?
Just enough ports for today's needs? A mixture of UTP speeds? Both UTP and fiber ports?
What are the factors that need to be addressed when selecting a router?
Expandability Media Operating System Features
What is the difference between a fixed and modular router?
A modular router has expansion slots that can be changed for future expansion. Fixed can not be changed.
List the features and services that can be provided based on the operating system selected.
Security Quality of Service (QoS) Voice over IP (VoIP) Routing multiple Layer 3 protocols Special services such as Network Address Translation (NAT) and Dynamic Host Configuration Protocol (DHCP)
What are the four physical areas to consider when wiring a LAN?
Work area Telecommunications room, also known as the distribution facility Backbone cabling, also known as vertical cabling Distribution cabling, also known as horizontal cabling
What is the total distance that a UTP cable can be per channel?
How long can a patch cable for interconnecting patch panels be?
How long can the cable be from the wall termination to the computer or phone?
What is horizontal cabling?
Horizontal media runs from a patch panel in the telecommunications room to a wall jack in each work area
What is backbone cabling?
Backbones, or vertical cabling, are used for aggregated traffic, such as traffic to and from the Internet and access to corporate resources at a remote location.
What are the three types of media we study?
UTP (Category 5, 5e, 6, and 7) Fiber-optics Wireless
What factors need to be considered when selecting the media to use?
Cable length - Does the cable need to span across a room or from building to building? Cost - Does the budget allow for using a more expensive media type? Bandwidth - Does the technology used with the media provide adequate bandwidth? Ease of installation - Does the implementation team have the ability to install the cable or is a vendor required? Susceptible to EMI/RFI - Is the local environment going to interfere with the signal?
Attenuation is reduction of the strength of a signal as it moves down a media.
What is the major factor that affects attenuation in network cables?
What two cost factors must be matched when selecting the media?
Match the performance needs of the users with the cost of the equipment and cabling to achieve the best cost/performance ratio
Does a server need more or less bandwidth than a single user?
List in numeric order the easiest to most difficult media to install.
1. wireless 2. UTP 3. Fiber Optic
What are the two forms of interference that can affect the network signals?
EMI- Electromagnetic Interference RFI- Radio Frequency Interference
What are the EIA/TIA cable specifications for the ends of UTP cables?
568A & 568B
Which pins are used for transmitting in a straight-through cable?
Pins 1 & 2
Which pins are used for receiving in a straight-through cable?
Pins 3 & 6
When do you use a straight-through cable?
When connecting unlike devices
When do you use a crossover cable?
When connecting like devices
Which connections use a straight-through cable?
Switch to a router Ethernet port Computer to switch Computer to hub
Describe the ends of a crossover cable.
The transmit of one end connects to the receive of the other end and vice-versa
Which connections are listed that require a crossover cable?
Switch to switch Switch to hub Hub to hub Router to router Ethernet port connection Computer to computer Computer to a router Ethernet port
Can modern devices be set so that different types of cables are not necessary?
What are the two types of connectors for the router end of a serial connection?
DB-60 or a smart serial connector
What is the connector at the network end called?
Winchester 15 pin connector
Define a DCE.
Data Communications Equipment (DCE) - A device that supplies the clocking services to another device. Typically, this device is at the WAN access provider end of the link.
Define a DTE. HINT: MALE who receives orders...lol
Data Circuit-Terminal Equipment (DTE) - A device that receives clocking services from another device and adjusts accordingly. Typically, this device is at the WAN customer or user end of the link.
Which end of the cable is responsible for supplying the clock rate?
Which end devices require an IP address?
User computers Administrator computers Servers Other end devices such as printers, IP phones, and IP cameras
Which network devices require IP addresses?
Router LAN interfaces Router WAN (serial) interfaces
Which network devices need IP addresses for management?
Switches Wireless Access Points
What are the three reasons given to subnet a network?
Manage broadcast traffic Different network requirements Security
What two calculations are necessary after the requirements are determined?
A unique subnet and subnet mask for each physical segment A range of usable host addresses for each subnet
What are the different types of hosts on a network?
General users Special users Network resources Router LAN interfaces Router WAN links Management access
What are router Ethernet connections used for?
Connecting to LAN
What are router Serial connections used for?
Connections between WANs
What is the router's console interface used for?
It is used for the initial configuration of the router
What is the security concern involving the console port of a router?
With physical access to the router's console interface, an unauthorized person can interrupt or compromise network traffic
What is the auxiliary port of a router used for?
To remotely configure a router
What device is normally attached to the auxiliary port?
What software is used when configuring a router?
What type of cable is connected between the router console port and computer?
RJ-45 to DB-9
What are the serial port connection settings required?
Bits per second: 9600 bps Data bits: 8 Parity: None Stop bits: 1 Flow control: None
What do you do to access the router if all connections are made properly?