Which three statements are true about the role of routers in the network? (Choose three.)

They propagate broadcasts.
They enlarge collision domains.
They segment broadcast domains.
They interconnect different network technologies.
Each router interface requires a separate network or subnet.
They maintain a common frame format between LAN and WAN interfaces.

A network administrator is required to use media in the network that can run up to 100 meters in cable length without using repeaters. The chosen media must be inexpensive and easily installed. The installation will be in a pre-existing building with limited cabling space. Which type of media would best meet these requirements?

STP
UTP
coaxial
single-mode fiber
multimode fiber

What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.)

greater distances per cable run
lower installation cost
limited susceptibility to EMI/RFI
durable connections
greater bandwidth potential
easily terminated

What does the IEEE 802.2 standard represent in Ethernet technologies?

MAC sublayer
Physical layer
Logical Link
Control sublayer
Network layer

Ethernet operates at which layer of the TCP/IP network model?

application
physical
transport
internet
data link
network access

Refer to the exhibit. What command was executed on a host computer to produce the results shown?

route PRINT
arp –a
arp –d
netstat
telnet

Ethernet operates at which layers of the OSI model? (Choose two.)

Network layer
Transport layer
Physical layer
Application layer
Session layer
Data-link layer

Convert the binary number 10111010 into its hexadecimal equivalent. Select the correct answer from the list below.

85
90
BA
A1
B3
1C

Refer to the exhibit. Host_A is attempting to contact Server_B. Which statements correctly describe the addressing Host_A will generate in the process? (Choose two.)

Refer to the exhibit. Host_A is attempting to contact Server_B. Which statements correctly describe the addressing Host_A will generate in the process? (Choose two.)

A packet with the destination IP of Router_B.

A frame with the destination MAC address of Switch_A.

A packet with the destination IP of Router_A.

A frame with the destination MAC address of Router_A.

A packet with the destination IP of Server_B.
A frame with the destination MAC address of Server_B.

Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which statement accurately reflects the operation of this link?

Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which statement accurately reflects the operation of this link?

Which two features make switches preferable to hubs in Ethernet-based networks? (Choose two.)

reduction in cross-talk
minimizing of collisions
support for UTP cabling
division into broadcast domains
increase in the throughput of communications

After an Ethernet collision, when the backoff algorithm is invoked, which device has priority to transmit data?

the device involved in the collision with the lowest MAC address
the device involved in the collision with the lowest IP address
any device in the collision domain whose backoff timer expires first
those that began transmitting at the same time

Which of the following is a drawback of the CSMA/CD access method?

Collisions can decrease network performance.
It is more complex than non-deterministic protocols.
Deterministic media access protocols slow network performance.
CSMA/CD LAN technologies are only available at slower speeds than other LAN technologies.

Which of the following describe interframe spacing? (Choose two.)

the minimum interval, measured in bit-times, that any station must wait before sending another frame

the maximum interval, measured in bit-times, that any station must wait before sending another frame

the 96-bit payload padding inserted into a frame to achieve a legal frame size

the 96-bit frame padding transmitted between frames to achieve proper synchronization

the time allowed for slow stations to process a frame and prepare for the next frame

the maximum interval within which a station must send another frame to avoid being considered unreachable

Refer to the exhibit. Which option correctly identifies content that the frame data field may contain?

Refer to the exhibit. Which option correctly identifies content that the frame data field may contain?

preamble and stop frame
network layer packet
physical addressing
FCS and SoF

What is the primary purpose of ARP?

translate URLs to IP addresses
resolve IPv4 addresses to MAC addresses
provide dynamic IP configuration to network devices
convert internal private addresses to external public addresses

What are three functions of the upper data link sublayer in the OSI model? (Choose three.)

recognizes streams of bits
identifies the network layer protocol
makes the connection with the upper layers
identifies the source and destination applications
insulates network layer protocols from changes in physical equipment
determines the source of a transmission when multiple devices are transmitting

In the graphic, Host A has reached 50% completion in sending a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to Host C. What must Host B do?

In the graphic, Host A has reached 50% completion in sending a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to Host C. What must Host B do?

Host B can transmit immediately since it is connected on its own cable segment.
Host B must wait to receive a CSMA transmission from the hub, to signal its turn.
Host B must send a request signal to Host A by transmitting an interframe gap.
Host B must wait until it is certain that Host A has completed sending its frame.

What three primary functions does data link layer encapsulation provide? (Choose three.)

addressing
error detection
frame delimiting
port identification
path determination
IP address resolution

Host A has an IP address of 172.16.225.93 and a mask of 255.255.248.0. Host A needs to communicate with a new host whose IP is 172.16.231.78. Host A performs the ANDing operation on the destination address. What two things will occur? (Choose two.)

Host A will change the destination IP to the IP of the nearest router and forward the packet.
Host A will broadcast an ARP request for the MAC of its default gateway.
A result of 172.16.225.0 will be obtained.
Host A will broadcast an ARP request for the MAC of the destination host.
A result of 172.16.224.0 will be obtained.
A result of 172.16.225.255 will be obtained.

What are the two most commonly used media types in Ethernet networks today? (Choose two.)

coaxial thicknet
copper UTP
coaxial thinnet
optical fiber
shielded twisted pair

How to view linux command history | linux history command in terminal

How to view Linux Terminal History

Command : history

Using Linux history Command You Can View Linux Command History in Linux terminal.

Show Terminal Command History Using History Command in Linux

Show Current Working Directory in Linux Terminal | Linux pwd Command

How to Find Current Working Directory in you're Linux Terminal.

Command : pwd

View Current Logged in User in Linux | Linux whoami Command

View Linux Current User

Command :  whoami 

To View Current Logged in User in Linux  you can use whoami  command in terminal in you're Linux Computer.

example whoami Command 

In example above whoami command returns user as the Current Logged In User.

How To Check SELinux Status | SELinux Commands In Linux

How To Check SELinux Status In Linux 

Command :  sestatus
Use sestatus Command to Check SELinux Status In You're CentOS Linux Machine.

How to Check Centos Version | Determine Centos Version

How to Get Centos Version

You Can Use cat /etc/centos-release Command.Also Using cat /etc/redhat-release and  cat /etc/*release* Command You can find centos version of your Computer

Example  

cat /etc/centos-release

Above example Shows current version of the Centos Machine as CentOS release 6.3 (Final)