Susan is troubleshooting a problem with a computer's network cabling. At which layer of the Open Systems Interconnection $($OSI$)$ Reference Model is she working?

Question $1$ options:

Application

Presentation

Session

Physical

Question $2(1$ point$)$

On early Ethernet networks, all computers were connected to a single wire, forcing them to take turns on a local area network $($LAN$).$ Today, this situation is alleviated on larger networks because each computer has a dedicated wire connected to a $\_\_\_\_\_\_\_\_\_\_\_$ that controls a portion of the LAN.

Question $2$ options:

firewall

router

server

switch

Question $3(1$ point$)$

Arturo would like to connect a fibre channel storage device to systems over a standard data network. What protocol should he use?

Question $3$ options:

Internet Small Computer System Interface $($iSCSI$)$

Fibre Channel $($FC$)$

Fibre Channel over Ethernet $($FCoE$)$

Secure Shell $($SSH$)$

Question $4(1$ point$)$

Wen is a network engineer. He would like to isolate several systems belonging to the product development group from other systems on the network, without adding new hardware. What technology is best to use?

Question $4$ options:

Network access control $($NAC$)$

Virtual LAN $($VLAN$)$

Virtual private network $($VPN$)$

Transport Layer Security $($TLS$)$

Question $5(1$ point$)$

Carrie is a network technician developing the Internet Protocol $($IP$)$ addressing roadmap for her company. While IP version $4($IPv$4)$ has been the standard for decades, IP version $6($IPv$6)$ can provide a much greater number of unique IP addresses. Which addressing system should she designate for primary use on her roadmap and why?

Question $5$ options:

IPv$6$ is rapidly replacing IPv$4$ worldwide. She should make IPv$6$ the primary addressing scheme in her roadmap.

IPv$6$ is only slowly being adopted. She should make IPv$4$ the primary addressing scheme in her roadmap until IPv$6$ is more widely adopted.

Few commercial businesses still use IPv$4.$ She should feature IPv$6$ strongly in her roadmap rather than have her company fall behind technologically.

There will be adequate IPv$4$ addresses available well into the future. She should make IPv$4$ the primary addressing scheme.

Question $6(1$ point$)$

A $\_\_\_\_\_\_\_\_$ is used to identify the part of an Ethernet network where all hosts share the same host address.

Question $6$ options:

router

subnet mask

access point

switch

Question $7(1$ point$)$

Because network computers or devices may host several services, programs need a way to tell one service from another. To differentiate services running on a device, networking protocols use a$($n$)\_\_\_\_\_\_\_\_,$ which is a short number that tells a receiving device where to send messages it receives.

Question $7$ options:

ping

Internet Protocol $($IP$)$ address

Media Access Control $($MAC$)$ address

network port

Question $8(1$ point$)$

What protocol is responsible for assigning Internet Protocol $($IP$)$ addresses to hosts on many networks?

Question $8$ options:

Dynamic Host Configuration Protocol $($DHCP$)$

Transport Layer Security $($TLS$)$

IP

Simple Mail Transfer Protocol $($SMTP$)$

Question $9(1$ point$)$

What network port number is used for unencrypted web$-$based communication by default?

Question $9$ options:

$80$

$143$

$443$

$3389$

Question $10(1$ point$)$

Hajar is investigating a denial of service attack against her network. She notices that the Internet Control Message Protocol $($ICMP$)$ echo replies coming into her network far exceed the ICMP echo requests leaving her network. What type of attack is likely taking place?

Question $10$ options:

Teardrop

Land

Smurf

Cross$-$site scripting $($XSS$)$

Question $11(1$ point$)$

Isabella is a network engineer. She would like to strengthen the security of her organization's networks by adding more requirements before allowing a device to connect to a network. She plans to add authentication to the wireless network and posture checking to the wired network. What technology should Isabella use?

Question $11$ options:

Network access control $($NAC$)$

Virtual LAN $($VLAN$)$

Virtual private network $($VPN$)$

A demilitarized zone $($DMZ$)$

Question $12(1$ point$)$

Carl recently joined a new organization. He noticed that the firewall technology used by the firm opens separate connections between the devices on both sides of the firewall. What type of technology is being used?

Question $12$ options:

Packet filtering

Application proxying

Stateful inspection

Network address translation

Question $13(1$ point$)$

What firewall approach is shown in the figure, assuming the firewall has three network cards?

Question $13$ options:

Border firewall

Bastion host

Screened subnet

Unified threat management

Question $14(1$ point$)$

Bob has a high$-$volume virtual private network $($VPN$).$ He would like to use a device that would best handle the required processing power. What type of device should he use?

Question $14$ options:

Firewall

Unified threat management $($UTM$)$

Router

VPN concentrator