Week 1 Review Questions
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School
Wilmington University *
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Course
SEC 235
Subject
Information Systems
Date
Feb 20, 2024
Type
docx
Pages
3
Uploaded by jessicahearn10
Week 1Review Questions
1.
How does the logical topology differ from the physical topology?
a.
Physical topology is about the layout and physical connections between devices, while logical topology is about the flow of data and the logical paths it takes.
2.
Why is a physical mesh topology normally an impractical solution?
a.
High Cost
: With the number of cables and ports needing connections, NICs (network interface cards, and ports can total up a high cost.
b.
Complexity
: added new devices require multiple connections, troubleshooting and maintenance becomes more time consuming.
c.
Maintenance Difficulty
: upgrading and maintenance extremely become time consuming,
along with adding devices adds multiple physical connections; more chances of error. 3.
What is the OSI model? Why is it important for understanding networking?
a.
OSI model (Open System Interconnections)
: complex process of sending data on a network; only defines standards for programmers and network administrators. NOT A MODEL OF PHYSICAL LAYERS
b.
Importance: i.
Common language/reference point for network professionals
ii.
Aids in troubleshooting
iii.
Networking tasks are divided into logical layer, easier to understand
iv.
Allows specialization of features at different levels
4.
What is the difference between connectionless and connection-oriented services?
a.
Both fall under Layer 4: Transport
, the main difference is: i.
Connectionless: unreliable delivery of data
ii.
Connection: reliable delivery of data
5.
How does TCP differ from UDP?
a.
TCP
(Transmission Control Protocol) and UDP
(User Datagram Protocol) are two of the most used transport layer protocols in computer networks. They differ in their approaches to data transmission and offer distinct features tailored for different types of
applications. 6.
How does SSH differ from Telnet? How does HTTPS differ from HTTP?
a.
SSH vs Telnet:
i.
SSH allows secure interactive control of remote systems. SSH is designed to provide a secure and encrypted communication channel, making it suitable for environments where data confidentiality and integrity are critical. Telnet allows computers to remotely access the computer system located somewhere else in the network. Lacking encryption, Telnet is considered less secure and is generally
avoided in favor of SSH in modern network configurations. b.
HTTPS vs HTTP: i.
The difference between HTTPS and HTTP is the level of security. HTTPS ensures secure communication by encrypting data, making it a crucial protocol for protecting sensitive information on the internet. HTTP is an information requesting and responding protocol. AHEARN, JESSICA A. (STUDENT)
Week 1Review Questions
7.
Why are wires twisted together in twisted pair cables?
a.
Twisting wires in a pair is a design technique employed in twisted pair cables to improve their performance by reducing interference, enhancing signal integrity, and providing flexibility. This makes twisted pair cables suitable for a wide range of applications, including networking, telecommunications, and data transmission.
8.
You have an installation that requires Cat 5 cabling. Which cable ratings could you use for the installation?
a.
When choosing a cable for your installation, Cat 5e is generally recommended over Cat 5
because it offers better performance and is backward-compatible with Cat 5 systems. It's
worth noting that while both Cat 5 and Cat 5e are widely used, Cat 5e has become the more common choice for new installations due to its improved specifications.
9.
How do light waves within a fiber optic cable travel around corners?
a.
Light waves within a fiber optic cable travel around corners through a process called total internal reflection. Fiber optic cables are made of a core, which is a thin strand of glass or plastic, surrounded by a cladding with a lower refractive index. The refractive index is a measure of how much a substance can bend light.
10.
What advantages do fiber optic cables offer over twisted pair cables and other media choices? What are the disadvantages of implementing fiber optic cables?
a.
Advantages:
i.
Greater Bandwidth
: Fiber optic cables provide much higher bandwidth compared to twisted pair cables
ii.
Longer Distance
: Light signals in fiber optic cables experience less signal degradation over long distances compared to electrical signals in twisted pair cables
iii.
Low Signal Loss
: Fiber optic cables experience minimal signal loss due to factors like resistance and interference
iv.
Security
: Fiber optic cables are more secure because they do not emit electromagnetic signals that can be intercepted
b.
Disadvantages:
i.
Cost: Fiber optic cables and the equipment required for their installation and maintenance can be more expensive than traditional copper cables
ii.
Fragility: Fiber optic cables are more fragile than copper cables, they can be damaged if bent too much or if excessive force is applied during installation
iii.
Installation: Installing fiber optic cables can be more complex than installing copper cables
iv.
Limited Flexibility: Fiber optic cables are less flexible than copper cables, which can make them challenging to install in tight spaces or navigate around obstacle
AHEARN, JESSICA A. (STUDENT)
Week 1Review Questions
11.
What is the difference between single-mode and multimode cables?
a.
Single: i.
Transfers through core using SINGLE
light path
ii.
Diameter 8-10.5 microns
iii.
Cable lengthens expand bigger distance
iv.
Optimized for 1310 nm & 1550 nm light sources
b.
Multimode:
i.
Transfers through core using MULTIPLE
light paths
ii.
Diameter 50-100 microns
iii.
Limited to distance and depend on bandwidth
iv.
Optimized for 85 nm and 1300 nm light source
AHEARN, JESSICA A. (STUDENT)
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