Chapter- 5 Ethernet Fundamentals - KSU

fac.ksu.edu.sa/wdahbour

CompTIA N +

Exam: N10-007

Walid Mahmoud Dahbour

King Saud University

Certified Professional Trainer (CPT)-(TTT)-(TOT)

CISCO Academy Instructor

Microsoft Academy Instructor

Cyber Security Trainer

MTA- MOS Trainer CompTIA Network+ Trainer

Chapter- 5

Ethernet Fundamentals

1

fac.ksu.edu.sa/wdahbour 2

Ethernet Fundamentals : 5 -1


Ethernet Fundamentals:


Origins of Ethernet:


How Should devices access the network:


Carrier Sense Multiple Access/ Collision Detection (CSMA/CD):


Example of CSMA/ CD:


Example of CSMA/ CD:


Collision Domain:


Collision Domains with Switches:


Speed Limitations:

Category

Cat-3

Cat-5

Cat-5e, cat-6

Cat-6a, Cat-7

Fiber Network


Network Infrastructure Devices: 5 - 2


Network Infrastructure:


Hub:


Collision Domains:


Bridges:

(One) Broadcast Domain

(Two) Collision Domains


Switches:


Layer-2 Switches:

4: Collision Domain

1: Broadcast Domain


How Switches Improve Network Performance:




















Routers:


Routers:


Layer-3 Switches:


Summary of Network Infrastructure:


Additional Ethernet Switch Features : 5 - 3


Additional Ethernet Switch Features:

** VLANs, Trunking, and STP will be covered in other lessons **


Link Aggregation (802.3ad):


Link Aggregation (802.3ad):


Power Over Ethernet (PoE 802.3af, PoE+ 802.3at):


Port Monitoring or Mirroring:


User Authentication (802.1x):


User Authentication (802.1x):


Management Access and Authentication:


First- Hop Redundancy


MAC Filtering:


Traffic Filtering:


Quality of Service (QoS):

** Quality of Service (QoS) will be covered in other lessons **


Virtual Local Area Network (VLAN): 5- 4


VLAN:


Before VLANs:


Using VLANs:


VLAN Trunking (802.1q):


VLAN Trunking (802.1q):


Specialized Network Devices: 5- 5

VPN concentrators

Firewalls DNS Server

DHCP Server

Proxy Server

Content Engines

and Switches


Specialized Network Devices:


VPN Concentrator:


Firewalls:


Next- Generation Firewall (NGFW):


Intrusion Detection or Intrusion Prevention System (IDS/IPS):


Domain Name System (DNS):

Who is https://www.google.com?

216.239.38.120


Fully- Qualified Domain Name (FQDN)

(Service.Name.Top Level Domain)

yahoo

Service: www, mail, ftp

Name: yahoo, Google, Amazon

Top Level Domain: .com, .mil, .edu

FQDN Example:

www.yahoo.com

FQDN Structure

1 2 3

1 2 3


Uniform Resource Locator (URL):

yahoo

• The URL contains the FQDN with method of accessing

information (Secured (https://) or not Secured (http://).

https://www.yahoo.com


Dynamic Host Configuration Protocol (DHCP):


Dynamic Host Configuration Protocol (DHCP):

D.O.R.A


Proxy Server:


Content Engine:


Content Switches:

Exp: Requests comes to

AMAZON


Chapter 5- Questions:


Question#1:

67

Which device improves network performance by dividing a given network segment

into separate collision domains?

A. Hub

B. Repeater

C. Switch

D. Router


Question#2:

68

Which of the devices listed below is used for separating broadcast domains?

A. Hub

B. Repeater

C. Switch

D. Router


Question#3:

69

The purpose of the Carrier Sense Multiple Access (CSMA) protocol is to verify the

absence of other traffic on a shared medium before transmitting to prevent

collisions and loss of data.

A. True

B. False.


Question#4:

70

Which of the following allows for verifying the absence of traffic on a shared

transmission medium in 802.3 networks?

A. CDMA

B. CSMA/CA

C. CWDM

D. CSMA/CD


Question#5:

71

Which of the terms listed below refers to a logical grouping of computers that

allow computer hosts to act as if they were attached to the same broadcast

domain regardless of their physical location?

A. VLAN

B. DNS

C. SNMP community

D. VPN


Question#6:

72

A network segment utilizing only this type of device is the most prone to network

performance degradation due to large number of network collisions.

A. Bridge

B. Hub

C. Switch

D. Router


Question#7:

73

In computer networking, the term "Collision" refers to a situation in which two or

more demands are made simultaneously on an equipment that can handle only

one request at any given moment.

A. True.

B. False.


Question#8:

74

Which of the following standards implements PoE+?

A. IEEE 802.1d

B. IEEE 802.3at

C. IEEE 802.1X

D. IEEE 802.3ab


Question#9:

75

A solution that allows to supply electricity over standard Ethernet cables is known

as: (Select 2 answers)

A. IEEE 802.3ab

B. PoE

C. IEEE Metro-Ethernet

D. IEEE 802.3af

E. PSTN


Question#10:

76

Which of the following allows an administrator to inspect the traffic passing

through a network switch?

A. Port mirroring

B. VLAN tagging

C. Fault-tolerant mode

D. Port scanning


Question#11:

77

To allow traffic from multiple VLANs on a single communication link, frames from

individual VLANs must be identified. The most common and preferred method, IEEE

802.1Q, adds a tag to the Ethernet frame header, labeling it as belonging to a certain

VLAN.

A. True

B. False


Question#12:

78

A type of port assigned to carry traffic from all the VLANs connected to a specific network

switch is known as:

A. Default gateway

B. Trunk port

C. Registered port

D. Mirrored port


Question#13:

79

An Ethernet switch forwards LAN traffic from connected devices based on the information

stored in:

A. DNS table

B. Routing table

C. MAC address table

D. All of the Above.


Question#14:

80

An Ethernet switch table containing IP-to-MAC address mappings is called:

A. ARP table

B. Routing table

C. MAC address table

D. DNS table


End of Chapter (5)

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Chapter- 5 Ethernet Fundamentals - KSU

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