Networking Exam

A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What are two possible causes of the signal distortion? (Choose two.)

* microwave oven * The cellular phone that are used by the employees.

How many binary bits exist within an IPv6 address?

128

How many bits are in an IPv4 address?

32

What are the two sizes (minimum and maximum) of an Ethernet frame?

64 Bytes 1518 Bytes

Data link layer protocols?

802.11 Ethernet PPP

What is auto-MDIX?

A Feature that detects Ethernet cable types

What Layer 2 function does a router perform? (Choose three.)

Accepts a frames from a medium De-encapsulates the frame Re-encapsulates the packet into a new frame

What type of address is 01-00-5E-0A-00-02?

An Address that reaches a specific Group of Hosts

What feature automatically negotiates the best speed and duplex setting between interconnecting devices?

Autonegotiaion

What is the name for the capacity of a medium to carry data?

Bandwidth

Which of the following wireless standards is used for Personal Area Networks (PANs) and allows devices to communicate over distances of 1 to 100 meters?

Bluetooth

What method is used to manage contention-based access on a wireless network?

CMSA/CA

Which data link layer media access control method does Ethernet use?

CMSA/CD

What is a characteristic of UTP cabling?

Cancellation

Which media access control method is used in legacy Ethernet LANs?

Carrier sense mutiple access/collision detection

What type of copper media attaches antennas to wireless devices? It can also be bundled with fiber-optic cabling for two-way data transmission.

Coaxial

What type of copper media terminates with BNC, N type and F type connectors?

Coaxial

What is a function of the MAC sublayer?

Controls access to media Checks for error in recieved bits Uses CSMA/CD or CSMA/CA to support Ethernet technology

Which media uses electrical pulses to represent bits?

Copper

Which switching method can be implemented using fast-forward switching or fragment-free switching?

Cut-Through Switching

Two methods for switching data between ports on a switch?

Cut-Through switching Store-and Forward Switching

Which part of an Ethernet Frame uses a pad to increase the frame field to at least 64 bytes?

Data Field

The physical layer of the receiving device passes bits up to which higher level layer?

Data Link

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

Data Link

Which statement describes the half-duplex mode of data transmission?

Data That is transmitted over the network flows in one direction at a time.

Which lists the Layer 2 and Layer 3 address fields in the correct order?

Destination NIC address, Source NIC addressm Source IP Address, destination IP address

What does a router do after de-encapsulating a received frame?

Determines the best Path

Which IPv4 address format was created for ease of use by people and is expressed as 201.192.1.14?

Dotted Decimal

Which part of an Ethernet Frame describes the higher-layer protocol that is encapsulated?

Ether Type

Which LAN topology is a hybrid topology?

Extended Star

True or false. Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance.

False

True or false. Wireless is not well suited for enterprise networks.

False

True or false? The physical layer is only concerned with wired network connections.

False

True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time.

False

Which media uses patterns of light to represent bits?

Fiber-Optic

What PDU is received by the physical layer for encoding and transmission?

Frame

Which part of an Ethernet frame detects errors in the frame?

Frame Check Sequence

Which duplex communication method is used in WLANs?

Half-Duplex

What does the data link layer add to a Layer 3 packet to create a frame? (Choose two.)

Header Trailer

Which organization defines standards for the network access layer (i.e., the OSI physical and data link layers)?

IEEE

Which standards organization oversees development of wireless LAN standards?

IEEE

Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)

IPV6 addresses are represented by hexadecimal numbers. IPV4 addresses are 32 bits in length.

Function of the Logical Link Control (LLC) sublayer?

Identifies which network layer protocol is being used.

2 engineering organizations define open standards and protocols that apply to the data link layer?

International Organization for STandarization (ISO) International Telecommunications Union (ITU)

Which function or operation is performed by the LLC sublayer?

It communicates with upper protocol layers.

Which statement correctly describes frame encoding?

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

What is one advantage of using fiber optic cabling rather than copper cabling?

It is able to carry signals much faster than copper cabling.

Two functions or operations are performed by the MAC

It is responsible for Media Access Control It Adds a Header and trailer to form an OSI Layer 2 PDU

Which two characteristics describe Ethernet technology?

It is supported by IEEE 802.3 standards. It uses the CMSA/CD access control method.

What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?

It will discard the frame.

What are two services performed by the data link layer of the OSI model?

Its accepts Layer 3 packets and encapsulates them into frames. It provides media access control and performs error detection.

Which data link sublayer controls the network interface through software drivers?

LLC

Which data link sublayer works with the upper layers to add application information for delivery of data to higher level protocols?

LLC

What are the two sublayers of the OSI model data link layer?

LLC MAC

What is another name for the OSI data link layer?

Layer 2

The IEEE 802 LAN/MAN data link layer consists of which two sublayers? (Choose two.)

Logical Link Control Media Access Control

Which topology displays networking device layer IP addresses?

Logical Topology

What is true concerning physical and logical topologies?

Logical topologies refer to how a network transfers frames..

What attribute of a NIC would place it at the data link layer of the OSI model?

MAC Address

What identifier is used at the data link layer to uniquely identify an Ethernet device?

MAC address

The media access control method used depends on which two criteria?

Media Sharing Topology

A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?

Mesh

Fiber-optic cable types can help data travel approximately 1.24 miles or 2 km/2000m?

Multimode

Fiber-optic cable types is used within a campus network?

Multimode

Fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?

Multimode

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?

Physical Layer

Two types of memory buffering techniques are used by switches?

Port-based memory buffering Shared Memory Buffering.

Which part of an Ethernet Frame notifies the receiver to get ready for a new frame?

Preamble

What is the responsibility of the MAC sublayer?

Provides the method to get the frame on and off the media

What type of cable is used to connect a workstation serial port to a Cisco router console port?

Rollover

What type of copper media counters EMI and RFI by using shielding techniques and special connectors?

STP

Fiber-optic cable types can travel approximately 62.5 miles or 100 km/100000 m?

Single-Mode

Fiber-optic cable types is used to connect long-distance telephony and cable TV applications?

Single-Mode

Fiber-optic cable types use lasers in a single stream as a data light source transmitter?

Single-Mode

What type of physical topology can be created by connecting all Ethernet cables to a central device?

Star

Which type of UTP cable is used to connect a PC to a switch port?

Straight-through

Which network device has the primary function to send data to a specific destination based on the information found in the MAC address table?

Switch

Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?

Switch

What happens to runt frames received by a Cisco Ethernet switch?

The Frame is Dropped

What addressing information is recorded by a switch to build its MAC address table?

The Source Layer 2 address of incoming frames

What is the definition of bandwidth?

The amount of data that can flow from one place to another in a given amount of time.

Which characteristic describes crosstalk?

The distortion of the transmitted messages from signals carried in adjacent wireless

A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?

The end-user device needs mobility when connecting to the network.

Which statement is true about MAC addresses?

The first 3 bytes are used by the vendor assigned OUI.

What is indicated by the term throughput?

The measure of the bits transferred across the media over a given period of time.

Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

The use of full-duplex capable Layer 2 switches.

Why are two strands of fiber used for a single fiber optic connection?

They allow for full-duplex connectivity.

What statement describes a characteristic of MAC addresses?

They must be gobally unique.

A measure of the transfer of bits across the media?

Throughput

What is the function of the last field in a data link layer frame?

To determine whether the frame experienced transmission errors

What is the purpose of the OSI physical layer?

Transmitting bits across the local media

Which procedure is used to reduce the effect of crosstalk in copper cables?

Twisting opposing circuit wire pairs together.

What is the most common network media?

UTP

What kind of network would use point-to-point, hub and spoke, or mesh topologies?

WAN

Which media uses patterns of microwaves to represent bits?

Wireless

Which of the following wireless standards is best suited for industrial and IoT environments?

Zigbee