Itec 350 Class Review packet

In which scenario would the use of a WISP be recommended? (Choose the BEST answer.) o An Internet café in a city o Any home with multiple wireless devices o An apartment in a building with cable access to the Internet o A farm in a rural area without wired broadband access

A farm in a rural area without wired broadband access

What is transmission delay?

Amount of time required to push the entire packet on the medium.

Name all the layers in the OSI model in correct order.

Application Presentation Session Transport Network Data Link Physical All people seem to need data processing

Name the PDUs in each of the relevant layers of this model. [You may answer this question while answering the above question; however, please write the PDU names alongside the corresponding layers.]

Application -> Data Transport-> Segment Network-> Packet/Datagram Data Link-> Frame Physical-> Bits

The physical layer of the receiving device passes bits up to which higher layer? (Select the best answer.) o Application o Presentation o Network o Data link

Data link

Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators? (Choose the BEST answer.) o Extranet o Extended net o Internet o Intranet

Extranet

When data is encoded as pulses of light, which media is being used to transmit the data? (Choose the BEST answer.) o Wireless o Fiber-optic cable o Copper cable

Fiber-optic cable

Give the two IEEE standards used by Ethernet.

IEEE 802.2 and IEEE 802.3

Which statement correctly describes frame encoding? o It transmits data signals along with a clock signal which occurs at evenly spaced time durations. o It uses the characteristics of one wave to modify another wave. o It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits. o It generates the electrical, optical, or wireless signals that represent the binary numbers of the frame

It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.

On which OSI layer does a hub work?

Layer 1

Which data link sublayer performs decapsulation?

MAC

Write one disadvantage of each: NRZ-I encoding Manchester encoding

NRZ-I encoding: Long string of zeros synchronization problem Manchester encoding: Lower bandwidth (due to higher baud rate), complex and expensive hardware required, more susceptible to noise and error

What is the primary job of layer 2 in this model?

Node to node (NIC to NIC) connectivity

Which feature is being used when connecting a device to the network using an electrical outlet? (Choose the BEST answer.) o Smart home technology o Powerline o Wireless broadband

Powerline

Name the four aspects of network reliability.

Scalability Fault tolerance Security QoS

What two approaches do the UTP copper cables follow to counter the challenges of EMI/RFI and Crosstalk?

Self-shielding approaches: i. Cancellation: Placing the pairs closely together ii. Twisting the wire pairs, varying number of twists per wire pair

What type of interface has no physical port associated with it? (Choose the BEST answer.) o Console o Ethernet o Serial o Switch Virtual Interface (SVI)

Switch Virtual Interface (SVI)

What is layer 4 called as?

Transport (Counted from bottom up)

Which of the following is the most common network media? (Select the best answer.) o UTP o STP o Coaxial

UTP

Which of the following wireless standards is best suited for industrial and IoT environments?(Select the best answer.) o Zigbee o WiMAX o Wi-Fi o Bluetooth

Zigbee

Perform the following conversions :a. (53) 10 to binary: b. (0101 1011) 2 to decimal: c. (49) 16 to decimal: d. (0101 1011) 2 to hexadecimal:

a.) 110101 b.) 91 c.) 73 d.) 5B

Navigation from the user EXEC mode to the privileged EXEC mode

enable

Securing the privileged EXEC mode access with the password class

enable secret class

What will a host on an Ethernet network do if it receives a frame with a unicast destination MAC address that does not match its own MAC address? (Select the best answer.) a. it will forward the frame to the next host b. it will discard the frame c. it will remove the frame from the media d. it will strip off the data-link frame to check the destination IP address

it will discard the frame

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized? o data link layer o presentation layer o network layer o physical layer

physical layer

Encryption of all plaintext passwords

service password-encryption

Why is ssh preferred over telnet for accessing a switch remotely?

ssh provides an encrypted connection (by encrypting the user authentication, passwords, and commands) in transit, telnet does not

Which type of UTP cable is used to connect a PC to a switch port? o rollover o console o crossover o straight-through

straight-through

Which is a function of the Logical Link Control (LLC) sublayer? (Select the best answer.) o to provide data link layer addressing o to accept segments and package them into data units that are called packets o to identify which network layer protocol is being used o to define the media access processes that are performed by the hardware

to identify which network layer protocol is being used

Encode the following digital signal using Differential Manchester encoding. 0 1 1 0 1 0 0 1

u/d d/u u/d u/d d/u d/u d/u u/d 0 1 1 0 1 0 0 1

What are the three different switch forwarding methods? Give one advantage of each.

• Store-and-forward o Advantages performs error detection on the entire frame, thus reduces Bandwidth consumption by corrupt data Required for QoS analysis • Cut-through o Fast-forward Advantage • Low latency o Fragment-free Advantage • Compromise between store-and-forward and cut-through (performs error detection on the first 64B)