Questions and Answers
What is a primary characteristic of a Local Area Network (LAN)?
Which of the following is a disadvantage of a bus topology?
What distinguishes a Wide Area Network (WAN) from a Local Area Network (LAN)?
In network topologies, what does the term 'physical topology' refer to?
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What is an advantage of the bus topology?
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In ring topology, how does data travel around the network?
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What is a common issue faced by networks using bus topology?
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Which of the following would likely be a consideration when implementing a WAN?
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What is the primary disadvantage of a ring network?
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In a Star Topology, what is the main role of the hub or switch?
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Which topology is characterized by each device connecting to every other device?
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Which of the following is a disadvantage of Star Topology?
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Which technology typically utilizes a multi-station access unit (MSAU)?
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What is a key advantage of using a Ring Topology?
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What is a common characteristic of Mesh Topology?
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Which of the following best describes a disadvantage of Ring Network configurations?
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What is a significant disadvantage of mesh topology?
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Which IEEE standard specifically addresses wireless networks?
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What is one advantage of wireless networking?
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Which statement is true regarding the IEEE standards?
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What is a notable complication of troubleshooting in a network with hybrid mesh topology?
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What is one of the potential issues associated with wireless networking?
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What advantage does mesh topology provide?
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What does the 802.3 IEEE standard define?
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What is the primary access method used in Token Ring networks?
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What is the maximum speed of Gigabit Ethernet as per the standards mentioned?
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Which of the following topologies is commonly utilized in Fast Ethernet?
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What is the primary media used for Token Ring networks?
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Which wireless standard provides a maximum speed of 54Mbps?
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What is the typical access method for 802.11b wireless networks?
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Which technology is characterized by a dual ring topology for fault tolerance?
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Which IEEE standard was introduced for fast data rates of up to 248Mbits/s?
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What access method does the 802.5 standard use?
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Which standard operates at a speed of 1000Mbps?
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What type of physical topology does the 802.3 standard use?
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What is the primary media used in the 802.11b standard?
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What maximum speed does the FDDI standard support?
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Which access method is used by both the 802.5 and FDDI standards?
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Study Notes
LANs and WANs
- LAN (Local Area Network): Limited to a single geographical location (e.g., office, school); high speed and cost-effective.
- WAN (Wide Area Network): Covers multiple geographical locations, linking separate LANs; slower than LANs and requires costly hardware, including routers and dedicated leased lines.
Network Topologies
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Topology: Defined as the physical and logical structure of a network.
- Physical Topology: Actual arrangement of cables and devices.
- Logical Topology: How the network appears to the users accessing it.
- Common topologies: bus, ring, star, mesh, and wireless.
Bus Topology
- Utilizes a trunk or backbone cable to connect all networked computers.
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Advantages:
- Inexpensive and easy to set up.
- Requires less cabling.
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Disadvantages:
- Network disruption when adding/removing devices.
- A break in the cable impedes access for all systems.
- Troubleshooting can be difficult.
Ring Topology
- Data travels in a circular path from one device to another.
- Often implemented using technologies like FDDI or Token Ring.
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Advantages:
- Easier to locate cable faults.
- Moderate installation difficulty.
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Disadvantages:
- Network disruptions during expansions.
- A single cable break disrupts the entire network.
Star Topology
- All devices connect to a central hub or switch.
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Advantages:
- Easily expandable without affecting network functionality.
- Faults affect only the connected device.
- Simplified troubleshooting and isolation of problems.
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Disadvantages:
- Requires more cabling than other topologies.
- Central hub represents a single point of failure.
Mesh Topology
- Each device connects to every other device, ensuring redundancy.
- Rarely used due to high cabling complexity and costs.
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Advantages:
- Multiple redundant paths between devices.
- Allows for expansion without disrupting current network service.
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Disadvantages:
- Higher cabling requirements compared to other topologies.
- Complicated implementation.
Wireless Networking
- Eliminates the need for physical cabling, enabling remote access, especially for laptops.
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Advantages:
- Seamless network expansion.
- Facilitates wireless remote access.
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Disadvantages:
- Security concerns related to wireless transmissions.
- Generally lower speeds compared to wired network topologies.
IEEE Networking Standards
- The Institute of Electrical and Electronic Engineers (IEEE) sets standards for compatibility among networking technologies.
- Standards cover cabling, devices, and protocols, promoting interchangeability across networks.
Key IEEE Standards
- 802.1: Internetworking.
- 802.2: Logical Link Control (LLC) sublayer.
- 802.3: Ethernet networks using CSMA/CD; supports different speeds (10 Mbps to 10 Gbps).
- 802.5: Token Ring networks utilizing token passing.
- 802.11: Standards for wireless networks, with multiple versions supporting varying speeds and frequencies.
802.3 Standard
- Defines characteristics of Ethernet networks.
- Speed variations: original 10Mbps, Fast Ethernet 100Mbps, Gigabit Ethernet 1000Mbps.
- Compatible with bus or star topologies and utilizes coaxial or twisted pair cabling.
802.5 Standard
- Specifies features for Token Ring networks, allowing speeds from 4 to 16Mbps.
- Typically employs a star physical topology but functions as a logical ring.
802.11 Standard
- Outlines characteristics of wireless LANs, employing wireless access points.
- Access method: CSMA/CA, which is a variation of CSMA/CD.
- Variants include 802.11b (11 Mbps), 802.11g (54 Mbps), 802.11n (up to 248 Mbps).
FDDI Standard
- Develops Fiber Distributed Data Interface (FDDI) technology using dual ring topology.
- Provides high-speed data transfer (100 Mbps or more) and ensures fault tolerance through dual rings.
- Media: primarily fiber optic, potentially copper with CDDI.
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Description
This quiz covers the basics of Local Area Networks (LANs), Wide Area Networks (WANs), and common network topologies. Explore the advantages and disadvantages of different topologies, including bus and ring configurations. Test your understanding of how these networks operate and their physical and logical structures.
