Networking & Cellular
E04 Networking Fundamentals — Study Guide
This guide covers Networking Fundamentals as part of Networking & Cellular. Start with the vocabulary, then try to answer each question before revealing the answer. Connect these facts to a real network or cellular connection and practice the subject in the arcade when you are ready.
Key facts
Network sizes fall into two general categories. What are they?
WAN and LAN
MAN is a subcategory of…
WAN
WLAN and PAN are subcategories of…
LAN
Which is the smallest and most basic network, typically a home, single office, or barracks room?
PAN
Typical range of a PAN?
0–30 ft
A PAN is primarily focused on…
flexibility (print anywhere, cast to a TV)
Which network connects devices within a building or 2–3 nearby buildings to share policies, info, and resources?
LAN
A LAN can have wireless connections but consists of mostly wired connections, which offer speed and security.
True
Which network type is a LAN primarily made of wireless tech — schools, coffee shops, airports?
WLAN
Which are listed as WLAN technologies?
Wi-Fi, Bluetooth, Hot-Spots
Which network incorporates multiple LANs to span a medium-sized area like a city?
MAN
Which network connects LANs/MANs across regions, countries, or the whole world?
WAN
What are the two types of network architecture?
Peer-to-Peer and Client-to-Server
In Client-Server architecture, who ALWAYS initiates communication?
The client
Which architecture has NO distinct roles — devices share in a 'workgroup'?
Peer-to-Peer
In which architecture must the server's compute, memory and storage scale to the clients' needs?
Client-to-Server
Which topology contains exactly 2 directly connected nodes?
Point-to-Point
Which topology has the HIGHEST bandwidth and speed but depends entirely on either node's up-time?
Point-to-Point
Point-to-Point is mostly seen when connecting two networks or…
sending confidential info between two directly connected nodes
Which topology connects all nodes through a central copper cable ('daisy-chained')?
Bus
In a Bus topology, what dissipates the signal at the cable end so it doesn't bounce back?
A terminator
Two signals crashing into each other on a cable so both drop is called a…
Collision
Which topology's advantage is 'repairs of a node don't affect others' and 'inexpensive' but is ineffective for large networks?
Bus
Which topology connects each node to its two neighbors with UNIDIRECTIONAL traffic?
Ring
Which topology goes entirely down if one cable or node breaks, and data travels through every node?
Ring
Ring topology advantages include reducing collisions and…
autonomous connectivity between nodes
Which is the MOST widely seen basic topology in modern networking?
Star
Which topology is 'node redundant' with centralized management, but its central device determines performance?
Star
Every node connected to more than 1 other node, with NO central connection point, defines…
Mesh
Which mesh type connects every node to every other node — used for backbones?
Full Mesh
Which is the MOST expensive topology, needing lots of cabling and specialized personnel?
Mesh
Mesh advantages include high traffic capacity, redundancy, and…
adaptive routing if a node breaks
Which topology interconnects multiple basic topologies to fit an organization's needs?
Hybrid
A 'Tree Topology' is a Hybrid that combines which topologies?
Bus and Star
Copper cables pass data using…
electrical signals
Which copper cable is almost obsolete for new LANs but still used for cable TV and residential internet?
Coaxial
Coax's braided metal conductor reduces induction, EMI, and…
RF interference
Which twisted pair is most commonly seen in home/office spaces?
UTP
STP uses what to further reduce interference?
A foil shield
Twisted-pair cable categories range from…
CAT-1 to CAT-8
The most common twisted-pair category (per slides) is…
CAT-5
Twisted-pair connects using which plug?
RJ-45
Which cable connects two DIFFERENT devices (PC to switch) with wires in the same order on both ends?
Straight-Through
Which cable connects two SIMILAR devices (PC to PC)?
Crossover
Devices transmit on pins ___ and receive on pins ___.
1 & 2; 3 & 6
Fiber optic cabling eliminates which problems?
EMI, RF interference, and induction static
Fiber's core is surrounded by a plastic coating, a layer of ____, and a Teflon or PVC jacket.
Kevlar
Wireless networks are identified by a…
Service Set Identifier (SSID)
Wireless devices must be on the same SSID to interface with each other.
True
Common Wi-Fi radio frequencies listed are…
2.4 GHz, 5 GHz, and recently 6 GHz
A wireless antenna communicates with what transceiver?
A Wireless Access Point (WAP)
Practice this module
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