Learning through written exercises
A. Multiple choice (a total of 44 questions)
- The computer must () to send data through the serial port out.
A, a digital signal into an analog signal
B, and the analog signals into digital signals
C, through a network adapter converts the serial bit stream into a parallel bit stream of the computer
D, via the network adapter within a computer parallel bit stream into a sequence line bitstream
correct answer: D my answer: D score: 2.0 - Bridges operate in ().
A, the physical layer
B, and they link layer
C, the network layer
D, high
correct answer: B I Answer: B Score: 2.0 - Uses CSMA / CD Ethernet protocol, its communication work in which one of the following ways. ()
A, simplex
B, half-duplex
C, full-duplex
D, can be
the correct answer: B I answer: B Score: 2.0 - In the relay system, the relay is ()
A, a physical layer
B, and they link layer
C, the network layer
D, the transport layer
right Answer: A I Answer: A score: 2.0 - A data link layer protocol data unit is transmitted ().
A, of ping
B, 'bit
C, delimiter
D, frame
correct answer: D I answer: D Score: 2.0 - The following functions belong to the data link layer is link management function ().
A, establishing a connection
B, flow control
C, sync frame
D, error control
right Answer: A I Answer: A Score: 2.0
7 form a star network is usually more expensive than a bus network formation, because () .
A, very expensive star hub
B, star network requires expensive connectors at the ends of each cable
C, star network interface card expensive than the bus line interface card
D, compared to the star network bus network requires more cable
correct answer: D my answer: D score: 2.0 - In the 10Base-T Ethernet, twisted pair as a transmission medium, the maximum length of the segment ().
A, 2000m
B, 500m
C, of 185 m
D, 100m
correct answer: D My answer: D Score: 2.0 - In the hierarchy of the OSI reference model, () is the data transfer unit frame.
A, the physical layer
B, and they link layer
C, the network layer
D, the transport layer is
the correct answer: B I Answer: B Score: 2.0 points
10. In the case of default configuration, all ports of a switch ()
A, in bar state
B, belong to the same VLAN
C, belongs to a different VLAN
D, Trunk link
the correct answer: B I answer: B score: 2.0 - Wherein 10BASE-5 LAN ().
A, thick coaxial cable baseband data transmission rate of 10Mbit / s, the maximum transmission distance of 200 m
B, thin coaxial cable baseband data transmission rate 10Mbit / s, the maximum transmission distance of 500 m
C, baseband data transmission rate thick coaxial cable 10Mbit / s, the maximum transmission distance of 500 m
D, thin coaxial cable baseband data transmission rate 10Mbit / s, the maximum transmission distance of 200 meters
the correct answer: C I answer: C score: 2.0 - CSMA / CD protocol is defined by IEEE802.3 standard, which applies to ()
A, Token Ring
B, token bus network
C, network interconnection
D, Ethernet
correct answer: D My answer: D Score: 2.0 - 10BASE-T standard is rate that can be supported ().
A, Mbps. 1
B, 10 Mbps
C, 100 Mbps
D,. 1 Gbps
correct answer: B I Answer: B Score: 2.0 - Connected to different switches, data frames belonging to the same VLAN must () of the port for transmission.
A, in a bar state
B, belong to the same VLAN
C, belongs to a different VLAN
D, Trunk link to
the correct answer: D My answer: D Score: 2.0 - Ethernet transmission of data using ().
A, direct binary encoding
B, cyclic code
C, Manchester encoding
D, differential Manchester encoding
correct answer: C I answer: C Score: 2.0 - Which of the following determine the MAC address is correct. ()
A, 00-60-08-A6
B, 202.192.3.22
C, ccpo.zucc.edu.cn
D, 00-60-08-A6-38-01
correct answer: D My answer: D Score: 2.0 points
answer Analysis: - The following functions belong to the data link layer link management function is ()
A, a connection
B, flow control
C, sync frame
D, error control
right Answer: A I Answer: A score: 2.0 - When using a dedicated communication line, a communication stage is omitted ().
A, establishing a communication line
B, to establish a data transmission link
C, transmits control signals and data communications
D, both confirming the completion of the communication
right Answer: A I Answer: A score: 2.0 - CSMA / CD refers to the "carrier sense multiple access / collision detection" technology, which adds clash detection on the basis of CSMA, when the network detects a site of conflict, it will immediately stop sending, and other sites ().
A, will receive the blocking signal
B, are in a wait state
C, the competition will send the right
D, may still continue to send
the correct answer: A My Answer: A Score: 2.0 - Networking equipment is the key to networking, which has four main types. Wherein a part of the data link layer ().
A, repeater
B, Bridge
C, Router
D, gateway
correct answer: B I answer: B Score: 2.0 - Token bus and token ring networks as compared to CSMA / CD, their main disadvantage is ().
A, delayed big
B, complex maintenance functions
C, low utilization of a heavy load line
D, priority service is not
the correct answer: B I answer: B Score: 2.0 - FR (Frame Delay) switched in frame units exchange, it is carried out on ().
A, the physical layer
B, and they link layer
C, the network layer
D, transport layer,
the correct answer: B I Answer: B Score: 2.0 - In the network layer provides protocol conversion between different networks stored in the network device forwards the packet is ().
A, Bridge
B, gateway
C, hubs
D, router
correct answer: D My answer: D Score: 2.0 - Ethernet core technology is ().
A, CSMA / CD method
B, token bus method
C, token ring method
D, carrier sensing method
correctly Answer: A I Answer: A score: 2.0 - VLAN plays an important role in modern networking technology, the two hosts in the same VLAN ()
A, must be connected to the same switch on
B, can span multiple switches
C, must be connected to the same hub
D, you can span multiple router
correct answer: B I answer: B score: 2.0 - 1000000000 yards added element received by one symbol error check, the bit error rate ()
A, -10 power of 10
B, -4 10 ^
C, -6 power of 10
D, 10 -9 th
correct answer: D my answer: D score: 2.0 - Ethernet switch using "port / MAC address mapping table" for data exchange method for establishing and maintaining dynamic switch port / MAC address mapping table is ().
A, address learning
B, artificial establish
C, the operating system establishes
D, polling
correct answer: A My Answer: A Score: 2.0
Answer Analysis: - The basic functions of the network interface card comprising: data conversion, and communication service ().
A, data transfer
B, the data cache
C, data services
D, data sharing
correct answer: B I answer: B Score: 2.0 - In computer networks, a local area network data transmission rate than the general wide area network data transfer rate ().
A, high
B, low
C, the same as
D, not sure
the correct answer: A My Answer: A Score: 2.0 - CSMA technique, the algorithm rules 1) as the medium is idle, sending immediately; 2) if the medium is busy, wait a random retransmission delay before repeat 1). The algorithm rules are called ().
A, non-persistence algorithm
B, 1- persistence algorithm
C, P- persistence algorithm
D, CSMA / CD algorithm
correct answer: A My Answer: A Score: 2.0 - For virtual local area network technology, the following statements is correct ().
A, node logic workgroup in the network composition is not limited by the physical location of the node where
B, Node logical workgroups in the network to be limited by the composition of the physical location of the node where
C, a logical node in the network working group must be on the same network segment
D, the above statement is not correct
correct answer: a my answer: a score: 2.0 - The following is not an advantage VLAN ().
A, broadcast storm control network
B, to ensure the security of the network
C, increasing the access network node
D, simplify network management
correct answer: C My answer: C Score: 2.0 - Card installed, no configuration is ().
A, interrupt number
B, the port address
C, the NIC driver
D, MAC address
correct answer: D My answer: D Score: 2.0 - About 100BASE-T, the following statement is wrong ().
A, data transfer rate of 100Mbps
B, the type of signal is a baseband signal
C, using Category 5 UTP, the maximum transmission distance of 185m
D, and shared support two modes switched
correct answer: C I Answer: A score : 0.0 points - About VLAN, the following statement is correct ()
A, a VLAN form a broadcast domain
B, a VLAN is a collision domain
C, can not communicate between each VLAN
D, between VLAN must exchange information through the server
the correct answer: A mine answer: A score: 2.0 - Whether SLIP or PPP protocols are () protocol.
A, the physical layer
B, and they link layer
C, the network layer
D, transport layer,
the correct answer: B I Answer: B Score: 2.0 - Which of the following statement is wrong ().
A, IP layer may mask the differences of each physical network
B, IP layer instead of the data link layer can work each physical network
C, IP layer may hide the implementation details of the respective physical network
D, IP datagrams layer transmission is
correct answer: B my answer: B score: 2.0 - In the twisted pair network in a way, what is the center of an Ethernet connected devices ().
A, hub
B, the transceiver
C, the relay
D, NIC
correct Answer: A I Answer: A score: 2.0 - CSMA / CD technique can only be used ()
A, bus topology
B, ring topology
C, star topology
D, irregular topology
correct answer: A My Answer: A Score: 2.0 - Campus grid is provided, the present Campus and external connectors should be used ().
A, repeater
B, Bridge
C, gateway
D, router
correct answer: D My answer: D Score: 2.0 - LAN protocol structure including ().
A, the physical layer
B, Physics layer, a data link layer
C, the physical layer, medium access control MAC sublayer, the logical link control LLC sublayer
D, the physical layer, data link layer, the network layer is
the correct answer: D I answer: D score: 2.0 - VLAN plays an important role in modern networking technology. In a local area network consisting of a plurality of VLAN, the following statements is not correct ()
A, when transferred from one site to another VLAN VLAN, generally no need to change the physical connection
B, a site may be another VLAN sites in direct communication VLAN
C, when the broadcast station in one VLAN, the VLAN other sites not receive
D, VLAN can be defined by a MAC address, switch port and the like.
The correct answer: B I answer: C score: 0.0 points - PPP is a protocol which layer protocol ()
A, a physical layer
B, and they link layer
C, the network layer
D, high
correct answer: B I Answer: B Score: 2.0 - PPP protocol, () is mainly used for the format and type of data packets on the data transmission link is negotiated.
A, Link Control Protocol
B, PPP protocol extensions
C, the network layer control protocol
D, PAP.CHAP protocol
correct answer: C I answer: C Score: 2.0
II. Fill in the blank (6 questions)
- An Ethernet switch forwards the frame can be divided into: cut exchange, exchange, and store and forward ().
The correct answer:
first empty:
Improved plunge exchange
my answer: Score: 2.0 points
first empty:
Improved plunge exchange
comments on - 100BASE-T transceiver from the hub to the maximum distance is 100m, a hub can connect up to 24 workstations; RJ-45 connector () and pin () for transmitting pin, () and pin () for receiving a pin.
The correct answer:
first empty:
1
second empty:
2
third empty:
3
fourth empty:
6
My answer: Score: 2.0 points
first empty:
1
second empty:
2
third empty:
3
fourth empty:
6
comments on - The data link layer channels used are (1) a channel-point; (2)
correct answer:
first air:
broadcast channel
my answer: Score: 2.0
the first hollow:
the broadcast channel
comments on - Bridge to complete the connection (between), can connect two or more segments.
The correct answer:
first empty:
Data Link Layer
my answer: Score: 2.0 points
first empty:
data link layer
comments on - LAN data link layer in the Reference Model is divided into two sublayers :() and the LLC layer.
The correct answer:
first empty:
the MAC layer
My answer: Score: 0.0 points
first empty:
the MAC
comments on - Broadcast communication channel, there are a variety of media access methods. IEEE 802 LAN includes provisions most commonly used three kinds, including :(), (), ().
The correct answer:
first empty:
CSMA / CD bus
second empty:
Token Ring
third empty:
token bus
My answer: Score: 0.0 points
first empty:
CSMA / CD
second empty:
TOKEN RING-
third empty :
TOKEN-BUS
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