Chapter 3 Test Network+
How long is the start frame delimiter?
1-byte
What was the maximum speed at which 10BaseT Ethernet networks communicate?
10 Mbps
What was the maximum distance between a hub and a node on a 10BaseT network?
100 meters
Which standard specified multimode cabling?
10BaseFL
Which Ethernet cabling standard defines an Ethernet network that uses CAT 3 or better UTP cabling, operating at 10 Mbps?
10BaseT
How many pairs of wires in a cable did a 10BaseT device actually use?
2
What was the original maximum data transfer rate of the first Ethernet developed by Xerox?
3 Mbps
What is the minimum size of an Ethernet frame
64 bytes
How many pins does an RJ-45 connector have?
8
T/F A repeater also functioned as an amplifier.
False
T/F Modern switches with auto-sensing ports require a crossover cable.
False
T/F The Ethernet frame type field tells you if the frame carries higher-level data, such as an e-mail message or Web page.
False
T/F The Ethernet networking technology standard was based on a ring topology.
False
T/F When a collision occurs on an Ethernet network, the cable is reserved for the nodes whose data collided until they have finished retransmitting.
False
Without the preamble, how many basic pieces of information does an Ethernet frame contain?
Five
Which companies were involved in the 1979 introduction of the DIX Ethernet standard?
Intel and Digital Equipment Corporation (DEC)
What is an advantage of fiber-optic cabling over Unshielded Twisted Pair (UTP)?
It has a longer maximum distance.
Which of the following statements best describes the preamble of an Ethernet frame?
It includes a 7-byte series of alternating ones and zeroes followed by a 1-byte Start Frame.
What is the meaning of the "10" in 10BaseT?
Maximum speed of 10 Mbps
When a collision occurs on a network relying on the CSMA/CD access method, what alerts the network interface cards (NICs)?
Overlapping signals
Which pins on an RJ-45 connector are used to receive data?
Pins 3 and 6
Which statement is an accurate comparison between repeaters and bridges?
Repeaters retransmit all packets, while bridges filter and forward traffic based on the MAC addresses of the computers on the network.
Which mechanism will move a port into a root-inconsistent state if BPDUs coming from a certain direction indicate another switch is trying to become the root bridge?
Root guard
The Ethernet standards body adopted the ____________________ to eliminate the problem of accidental bridging loops.
STP
What information is included in the data portion of an Ethernet frame on an IP network?
The IP addresses of both systems
What is a shared attribute of all members of the Ethernet family of networking technologies?
The network access method
In a specification such as 10BaseT, what does the word "base" identify?
The signal type
What is the purpose of a crimper?
To connect a RJ-45 connector to the cable
T/F An Ethernet frame may carry one of several types of data.
True
T/F Ethernet identifies the NICs on a network using special 48-bit (6-byte) binary addresses known as MAC addresses.
True
T/F Regardless of the implementation of an Ethernet network, the design of the frames remains the same.
True
T/F The preamble is added by the sending network interface card (NIC).
True
Which type of cabling does the 10BaseT standard specify?
Unshielded Twisted Pair (UTP)
____________________ enable(s) you to connect two switches using a straight-through cable.
Uplink ports
Why are crossover cables rarely used anymore?
Wireless technology has superseded the need for crossover cables.
A __________ is a special Spanning Tree Protocol (STP) frame that switches use to communicate with other switches to prevent loops from happening in the first place.
bridge protocol data units (BPDUs) BPDU
Originally, Ethernet used ____________________ cabling, which easily created bus topologies.
coaxial
In a pinch, you can use a(n) ____________________ cable to connect two computers together using Ethernet NICs with no switch or hub between them at all.
cross-over
Configuration bridge protocol data units (BPDUs) establish the topology, where one switch is elected __________ and acts as the center of the STP universe.
root bridge
If every node on the network connects to the same switch, that switch becomes a(n) ____________________—if it fails, everybody drops off the network.
single point of failure