Flashcards in Chapter 1 - Sheet1 Deck (34):
List the 7 common topologies
Bus, star, ring, mesh, point-to-point, point-to-multipoint, hybrid
Physical topologies describe what?
Human-visible arrangement and connection of hosts. What the "humans see"
Logical topologies describe what?
How data moves through the network. What the "equipment sees"
Describe a bus topology
two distinct and terminated ends, with each of its computers connecting to one unbroken cable running its entire length
What are the advantages of the bus topology?
Easy to install, inexpensive b/c it doesn't require as much cable
What are the disadvantages of the bus topology?
Difficult to troubleshoot/change/move. Everything is connected, so it doesn't excel at fault tolerance.
Describe star topology
A star topology’s computers are connected to a central point with their own individual
cables or wireless connections. You’ll often find that central spot inhabited by a device like
a hub, a switch, or an access point.
What are the advantages of the star topology?
New stations can be added easily and quickly; A single cable failure won’t bring down the entire network.;It is relatively easy to troubleshoot.
What are the disadvantages of the star stopology?
If the central device fails (the switch/hub/etc), the entire network goes down.;It has a single point of failure (the hub or other central device).
Describe ring topology
In this type of topology, you’ll find that each computer is directly connected to other computers
within the same network
What are the advantages of the ring topology?
What are the disadvantages of the ring topology?
Difficult to troubleshoot/change/move. Everything is connected, so it doesn't excel at fault tolerance. Expensive to install (more cables)
Describe mesh topology
In this type of topology, you’ll find that there’s a path from every machine to every other
one in the network.
What are the advantages of the mesh topology?
Most tolerant of faults; lowest potential for collisions;
What are the disadvantages of the mesh topology?
Expensive, even for small networks; complicated to manage;
Describe point-to-point topology.
As its name implies, in a point-to-point topology you have a direct connection between two
routers, giving you one communication path. The routers in a point-to-point topology can
either be linked by a serial cable, making it a physical network, or be far apart and connected
only by a circuit within a Frame Relay or MPLS network, making it a logical network.
What are the advantages of point-to-point topology?
What are the disadvantages of point-to-point topology?
Not very scalable;
Describe point-to-multipoint topology.
Again as the name suggests, a point-to-multipoint topology consists of a succession of connections
between an interface on one router and multiple destination routers—one point
of connection to multiple points of connection. Each of the routers and every one of their
interfaces involved in the point-to-multipoint connection are part of the same network.
Describe hybrid topology
a combination of two or more types of physical or logical network
topologies working together within the same network.
local area network (LAN) is usually restricted to spanning a particular geographic location such as an office building, a single department within a corporate office, or even a home office. Made up of network segments.
WAN networks are what we use to span large geographic
areas and truly go the distance. Like the Internet, WANs usually employ both routers and
public links, so that’s generally the criteria used to define them.
What are 5 ways WANs differ from LANs?
NN WANs usually need a router port or ports.
NN WANs span larger geographic areas and/or can link disparate locations.
NN WANs are usually slower.
NN We can choose when and how long we connect to a WAN. A LAN is all or nothing—
our workstation is either connected permanently to it or not at all, although most of us
have dedicated WAN links now.
NN WANs can utilize either private or public data transport media such as phone lines.
A _____ is used to connect a group of _____
together, and a _____ is used to connect various _____ together.
A LAN is used to connect a group of hosts
together, and a WAN is used to connect various LANs together.
What are the three primary LAN topologies?
Bus, ring, and star
What common WAN topology often results in multiple connections to a single site
(leading to a high degree of fault tolerance) and has one-to-many connections?
Multiprotocol Label Switching (MPLS)
What is the term for a device that shares its resources with other network devices?
What network model draws a clear distinction between devices that share their
resources and devices that do not?
Which network topology or connection type can be implemented with only two
What device is an example of an Ethernet technology implemented as a star topology?
MultiProtocol Label Switching. MPLS is a switching mechanism that imposes labels (numbers) to data and then uses
those labels to forward data when the data arrives at the MPLS network
What does WAN stand for?
Wide Area Network
Will a computer that shares no resources most likely be connected to the backbone or
to a segment?