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1
Q

What kind of cable is used to connect to a Cisco device via the RJ45 console port?

a. Rollover cable
b. Crossover cable
c. USB cable

A

b. Crossover cable

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2
Q

You type enable to enter privileged exec mode on your Cisco router, however the password you enter is not accepted. What could be the problem?

a. service password-encryption is enabled
b. service password encryption is disabled
c. Caps Lock is on

A

c. Caps Lock is on. Passwords are case sensitive

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3
Q

What is the most secure method to protect access to privileged EXEC mode?

a. enable secret
b. enable password
c. enable password with service password-encryption

A

a. enable secret

enable secret command configures a password that is automatically encrypted. It uses MD5, a more secure form of encryption

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4
Q

If both the enable password and the enable secret command are configured, what will happen when you use enable to enter privileged EXEC mode?

a. you must enter the enable password, followed by the enable secret
b. you must enter the enable password only
c. you must enter the enable secret only

A

c. you must enter the enable secret only

Secret always takes priority over password, and you will never be asked to enter both.

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5
Q

What is the full length version of the conf t command in the Cisco IOS CLI?

A

configure terminal

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6
Q

When you first log in to a Cisco device on the Cisco IOS CLI, what mode will you be in?

A

user EXEC mode

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7
Q

What symbol signifies user EXEC mode in the Cisco IOS CLI?

A

>

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8
Q

What command do you enter to go in to privileged EXEC mode in the Cisco IOS CLI?

A

enable

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9
Q

What symbol signifies privileged EXEC mode in the Cisco IOS CLI?

A

#

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10
Q

What does the enable command do in Cisco IOS CLI?

A

Allows you to enter privileged EXEC mode

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11
Q

What is the definition of a computer network?

A

A computer network is a digital telecommunications network which allows nodes to share resources.

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12
Q

What is the definition of a client?

A

A client is a device that accesses a service made available by a server.

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13
Q

What is the definition of a server?

A

A server is a device that provides functions or services for clients.

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14
Q

What is a switch?

A

Switches…

  • have many ports for end hosts to connect to
  • provide connectivity to hosts within the same LAN
  • do not provide connectivity between LANs/over the internet
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15
Q

What is a router?

A

Routers are used to provide connectivity between LANs, and are therefore used to send data over the Internet.

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16
Q

What is a firewall?

A

A firewall is a device that monitors and controls network traffic based on configured rules.

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17
Q

Where can firewalls be located?

A

Firewalls can be ‘inside’ the network (after the router) or ‘outside’ the network (before the router)

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18
Q

What does LAN stand for?

A

Local Area Network

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19
Q

What is a firewall that includes modern and advanced filtering capabilities?

A

A Next-Generation Firewall

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20
Q

What is a network firewall?

A

A network firewall is a hardware device that filters traffic between networks

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21
Q

Your company wants to purchase some network hardware to which they can plug in the 30 PCs in your department. What type of network device is appropriate?

A

A switch. Switches are designed to connect many end hosts in the same LAN.

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22
Q

You receive a video file from your friend’s iPhone using AirDrop. What was their device function as?

A

A server

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23
Q

You receive a video file from your friend’s iPhone using AirDrop. What was your device function as?

A

A client

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24
Q

What is your device functioning as while you watch a YouTube video?

A

A client

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25
Your company wants to purchase some network hardware to connect its separate networks together. What kind of network device is appropriate?
A router
26
What does RJ stand for in RJ-45?
Registered Jack
27
How many Bits in a Byte?
8
28
What is the speed (in Mbps) of 10BASE-T?
10 Mbps
29
What is the speed (in Mbps) of 100BASE-T?
100 Mbps
30
What is the speed (in Gbps) of 1000BASE-T?
1 Gbps
31
What is the speed (in Gbps) of 10GBASE-T?
10 Gbps
32
What is the maximum usable length of a UTP cable?
100 meters or about 300 feet
33
What does UTP stand for in a UTP cable?
Unshielded Twisted Pair
34
What is the maximum usable length of Multimode fiber cables?
400 meters
35
What is the maximum usable length of Single-Mode fiber cables?
30 kilometers
36
You connect two old routers together with a UTP cable, however data is not successfully sent and received between them. What could be the problem? a. they are connected with a straight-through cable b. they are connected with a crossover cable c. they are operating in Auto MDI-X mode
a. they are connected with a straight-through cable
37
What is a crossover cable?
A crossover cable enables devices that transmit and receive on the same pins to still communicate by crossing over the pins.
38
What does Auto MDI-X mean?
Auto MDI-X allows devices to detect which pins and wires their neighbor is using to transmit and receive data, and adjust their own operations to match.
39
What kind of cable should you use to connect two switches that are about 150 meters apart and keep costs down?
Multimode fiber because multimode is cheaper than single-mode.
40
What kind of cable should you use to connect two switches that are about 3 kilometers apart?
Single-mode fiber
41
What kind of cable should you use to connect many end hosts to a switch on the same office floor?
UTP
42
What is a networking model?
Networking models categorize and provide a structure for networking protocols and standards.
43
What is a networking protocol?
A networking protocol is a set of rules defining how network devices and software should work.
44
What does OSI stand for in the OSI model?
Open Systems Interconnection
45
How many layers are in the OSI model?
7 layers
46
What are the seven layers of the OSI Model?
``` From the top: Application Presentation Session Transport Network Data Link Physical ``` Remember like this: All People Seem To Need Dick Protection
47
What is adjacent-layer interaction?
Interaction between the different layers of the OSI model.
48
Interaction between the same layers of different systems is called what?
Same-layer interaction
49
What are the three Upper Layers of the OSI Model?
Application, Presentation, and Session. Network engineers don't typically work with these top 3 layers.
50
What is the function of the top 3 layers of the OSI model in encapsulation?
Create the Data.
51
What is the function of the Transport layer in the OSI Model?
Segment and reassemble data for communications between end hosts
52
What does the Transport layer add to the Data during encapsulation?
A header
53
Which layer provides host-to-host aka end-to-end communication in either the OSI or the TCP/IP Suite model?
Layer 4, Transport
54
What is the function of the Network layer in the OSI model?
- Provide connectivity between end hosts on different networks (ie outside of the LAN) - Provide logical addressing (IP addresses) - Provide path selection between source and destination
55
Which layer in the OSI model do routers operate at?
Layer 3, Network
56
What does the Network layer add to the Data during encapsulation?
A header
57
What is the combination of Data and a Layer 4 (L4) header called?
A segment
58
What is a segment in regard to the OSI model?
The combination of Data and the Layer 4 (L4) header
59
What is the combination of Data, a Layer 4 (L4) header, and a Layer 3 (L3) header called?
A packet
60
What is a packet in regard to the OSI model?
The combination of Data, a Layer 4 (L4) header, and a Layer 3 (L3) header
61
What does the Data Link layer add to the Data during encapsulation?
A header and trailer
62
What is the function of the Data Link layer in the OSI model?
- To provide node-to-node connectivity and data transfer (for example, PC to switch, switch to router, router to router) - To define how data is formatted for transmission over a medium - To detect and possibly correct Physical Layer errors
63
At what layer of the OSI model do switches operate at?
Layer 2, Data Link
64
What is a frame in regard to the OSI model?
The combination of Data, Layer 4 (L4) header, Layer 3 (L3) header, and Layer 2 (L2) header and trailer
65
What is the combination of Data, Layer 4 (L4) header, Layer 3 (L3) header, and Layer 2 (L2) header and trailer called?
A frame
66
What is the function of the Physical layer in the OSI model?
- Define physical characteristics of the medium used to transfter data between devices - Convert digital bits into electrical or radio signals
67
What is a Layer 4 PDU?
A segment
68
What is a Layer 3 PDU?
A packet
69
What is a Layer 2 PDU?
A frame
70
What does PDU stand for?
Protocol Data Unit
71
What is a Layer 1 PDU?
A bit
72
What communication protocol is actually in use in modern networks?
The TCP/IP Suite model
73
What layer(s) of the OSI model are equivalent to the Application layer of the TCP/IP Suite model?
Application Presentation Session
74
What layer(s) of the OSI model are equivalent to the Transport layer of the TCP/IP Suite model?
Transport
75
What layer(s) of the OSI model are equivalent to the Internet layer of the TCP/IP Suite model?
Network
76
What layer(s) of the OSI model are equivalent to the Link layer of the TCP/IP Suite model?
Data Link | Physical
77
What layer provides process-to-process communication in the TCP/IP Suite?
Application
78
HTTP data sent from a YouTube web server is displayed via your web browser. This is an example of what?
Same-layer interaction

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