Computer Networking
The physical layer, in reference to the OSI model, defines

All of these
the virtual circuit interface to packet-switched service
data link procedures that provide for the exchange of data via frames that can be sent and received
the interface between the X.25 network and packet mode device
None of these

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
Communication network is

a collection of interconnected functional units that provides a data communications service among stations attached to the network
None of these
the condition with two or more stations attempt to use the same channel at the same time
one or more conductors that serve as a common connection for a related group of devices
a continuous frequency capable of being modulated or impressed with a second signal

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To prevent switching loops in networks with redundant switched paths
To manage the VLAN database across multiple switches
To create collision domains
To provide a mechanism for network monitoring in switched environments
To prevent routing loops in networks with redundant paths

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
HDLC (High-level Data Link Control) is

None of these
a method of determining which device has access to the transmission medium at any time
a very common bit-oriented data link protocol issued by ISO.
network access standard for connecting stations to a circuit-switched network
a method access control technique for multiple-access transmission media

ANSWER DOWNLOAD EXAMIANS APP