IEEE 802 defines a set of standards for networks, including Ethernet (802.3) and
ID: 655243 • Letter: I
Question
IEEE 802 defines a set of standards for networks, including Ethernet (802.3) and wifi (802.11).
a) True b) False
The main reason that Ethernet networks based on UTP cabling (e.g. 10Base-T) were more popular than networks based on coaxial (10Base-2 and 10Base-5) was that UTP was less susceptible to noise and had lower attenuation than coaxial cable.
a) True b) False
The traditional telephone network used circuit switching technology
a) True b) False
An enterprise today is not likely to purchase a device called a multiplexer. However, multiplexing is a part of many networking technologies, including some WAN technologies, cable modems, and wifi networks.
a) True b) False
Switches forward frames based on IP addresses, while routers forward packets based on MAC addresses.
a) True b) False
Ethernet networks with switches use a ___ physical topology.
a) True b) False
Traffic on a switch port supporting multiple VLANs will use an 802.1q header in the Ethernet frame.
a) True b) False
Because routers operate at layer 3 of the OSI model, they can forward traffic between network technologies which have different media access mechanisms (e.g. between Ethernet LAN and ATM WAN).
a) True b) False
IP offers reliable, connection-oriented service.
a) True b) False
TCP offers reliable, connection-oriented service.
a) True b) False
UDP offers reliable, connection-oriented service.
a) True b) False
Most Ethernet devices today permit full-duplex operation
a) True b) False
A subnet mask allows a host to determine which bits in its address are associated with the network address, and which bits identify the host within the network.
a) True b) False
Routers usually forward packets based on the source IP address.
a) True b) False
TCP sessions start with a 3-way handshake between the sending and receiving hosts.
a) True b) False
DHCP (Dynamic Host Configuration Protocol) assigns IP address and related configuration information to computers.
a) True b) False
DNS (Domain Name System) maps human-friendly names (like www.rivier.edu) (Links to an external site.) to IP addresses (like 66.251.112.8).
a) True b) False
Telnet is a secure, encrypted protocol.
a) True b) False
A routing protocol allows routers to exchange routing information. This information includes what subnets can be reached by which routes/routers.
a) True b) False
Explanation / Answer
1 )IEEE 802 defines a set of standards for networks, including Ethernet (802.3) and wifi (802.11).
ans) True
Explanation :
The IEEE 802 Standard comprises a family of networking standards that cover the physical layer specifications of technologies from Ethernet to wireless. IEEE 802 is subdivided into 22 parts that cover the physical and data-link aspects of networking. The better known specifications (bold in table below) include 802.3 Ethernet, 802.11 Wi-Fi, 802.15 Bluetooth/ZigBee, and 802.16.
2)
The main reason that Ethernet networks based on UTP cabling (e.g. 10Base-T) were more popular than networks based on coaxial (10Base-2 and 10Base-5) was that UTP was less susceptible to noise and had lower attenuation than coaxial cable.
a) True
Explanation;
Cable Comparison Summary
3) The traditional telephone network used circuit switching technology
a) True
4) An enterprise today is not likely to purchase a device called a multiplexer. However, multiplexing is a part of many networking technologies, including some WAN technologies, cable modems, and wifi networks.
a) True
5) Switches forward frames based on IP addresses, while routers forward packets based on MAC addresses.
a) True
6) Ethernet networks with switches use a physical topology.
a) True
7) Traffic on a switch port supporting multiple VLANs will use an 802.1q header in the Ethernet frame.
a) True
8) Because routers operate at layer 3 of the OSI model, they can forward traffic between network technologies which have different media access mechanisms (e.g. between Ethernet LAN and ATM WAN).
a) True
9)IP offers reliable, connection-oriented service.
a) True
10) TCP offers reliable, connection-oriented service.
a) True
11) UDP offers reliable, connection-oriented service.
a) True
12) Most Ethernet devices today permit full-duplex operation
a) True
13) A subnet mask allows a host to determine which bits in its address are associated with the network address, and which bits identify the host within the network.
a) True
11) Routers usually forward packets based on the source IP address.
a) True
12) TCP sessions start with a 3-way handshake between the sending and receiving hosts.
a) True
13) DHCP (Dynamic Host Configuration Protocol) assigns IP address and related configuration information to computers.
a) True
14) DNS (Domain Name System) maps human-friendly names (like www.rivier.edu) (Links to an external site.) to IP addresses (like 66.251.112.8).
a) False
15) Telnet is a secure, encrypted protocol.
a) False
16) A routing protocol allows routers to exchange routing information. This information includes what subnets can be reached by which routes/routers.
a) True
Characteristics Thinnet coaxial(10Base2) Cable Thicknet coaxial
(10Base5) Cable Twisted-pair
(10BaseT) Cable1 Fiber-optic Cable Cable cost More than UTP More than thinnet UTP: Least expensive
STP: More than thinnet More than thinnet, but less than thicknet Usable cable length2 185 meters (about 607 feet) 500 meters (about 1640 feet) UTP and STP: 100 meters (about 328 feet) 2 kilometers (6562 feet) Transmission rates 4-100 Mbps 4-100 Mbps UTP: 4-100 Mbps
STP: 16-500 Mbps 100 Mbps or more ( > 1Gbps) Flexibility Fairly flexible Less flexible than thinnet UTP: Most flexible
STP: Less flexible than UTP Less flexible than thicknet Ease of installation Easy to install Moderately easy to install UTP: Very easy; often preinstalled
STP: Moderately easy Difficult to install Susceptibility to interference Good resistance to interference Good resistance to interference UTP: Very susceptible
STP: Good resistance Not susceptible to interference Special features Electronic support components are less expensive than twisted-pair cable Electronic support components are less expensive than twisted-pair cable UTP: Same as telephone wire; often preinstalled in buildings
STP: Supports higher transmission rates than UTP Supports voice, data, and video Preferred uses Medium to large sites with high security needs Linking thinnet networks UTP: smaller sites on budget. STP: Token Ring in any size Any size installation requiring speed and high data security and integrity