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Worksheetscisco b1 ch 3-8, 11
Total questions: 103
Worksheet time: 55mins
The process of converting information into the proper form for transmission
Formatting
Encoding
Encapsulation
Which step of the communication process is concerned with properly identifying the address of the sender and receiver?
Formatting
Encoding
Encapsulation
Which three are components of message timing?
Flow control
Sequence numbers
Response timeout
Retransmit time
Access method
Which delivery method is used to transmit information to one or more end devices, but not all devices on the network?
Unicast
Multicast
Broadcast
BGP and OSPF are examples of which type of protocol?
network communication
network security
routing
service discovery
Which two protocols are service discovery protocols?
DNS
TCP
SSH
DHCP
What is the purpose of the sequencing function in network communication?
to uniquely label transmitted segments of data for proper reassembly by the receiver
to determine if data is corrupted during transmission
to ensure data flows at an efficient rate between sender and receiver
to guarantee delivery of data
This protocol is responsible for guaranteeing the reliable delivery of information.
TCP
IP
HTTP
Ethernet
UDP and TCP belong to which layer of the TCP/IP protocol?
application
transport
internet
network access
Which two protocols belong in the TCP/IP model application layer?
EIGRP
DNS
OSPF
ICMP
DHCP
Which protocol operates at the network access layer of the TCP/IP model?
HTTP
IP
DNS
Ethernet
Protocols that provide feedback from the destination host to the source host regarding errors in packet delivery
IPv4
ICMPV6
ICMPv4
IPv6
UDP
A device receives a data link frame with data and processes and removes the Ethernet information. What information would be the next to be processed by the receiving device?
HTTP at the application layer
HTML at the application layer
IP at the internet layer
UDP at the internet layer
TCP at the transport layer
Which services are provided by the internet layer of the TCP/IP protocol suite?
File Transfer
Routing Prtocols
Ethernet
IP
Messaging
Standards organizations are usually vendor-neutral.
True
False
This standards organization is concerned with the Request for Comments (RFC) documents that specify new protocols and update existing ones.
Internet Society (ISOC)
Internet Engineering Task Force (IETF)
Internet Architecture Board (IAB)
Internet Research Task Force (IRTF)
This standards organization is responsible for IP address allocation and domain name management.
Internet Society (ISOC)
Internet Engineering Task Force (IETF)
Internet Architecture Board (IAB)
Internet Assigned Numbers Authority (IANA)
What types of standards are developed by the Electronics Industries Alliance (EIA)?
electric wiring and connectors
radio equipment and cell towers
video compression and broadbard communications
Voice over IP (VoIP) and satellite communications
Process of dividing a large data stream into smaller pieces prior to transmission
sequencing
duplexing
multiplexing
segmentation
PDU associated with the transport layer
segment
packet
bits
frame
Protocol stack layer that encapsulates data into frames
data link
transport
network
app
Name of the process of adding protocol information to data as it moves down the protocol stack
de-encapsulation
sequencing
segmentation
encapsulation
Which three acronyms/initialisms represent standards organizations?
IEEE
MAC
IETF
TCP/IP
IANA
What type of communication will send a message to all devices on a local area network?
multicast
allcast
unicast
broadcast
In computer communication, what is the purpose of message encoding?
to negotiate correct timing for successful communication
to break large messages into smaller frames
to interpret information
to convert information to the appropriate form for transmission
What are two benefits of using a layered network model?
It assists in protocol design
It ensures a device at one layer can function at
the next higher layer
It speeds up packet delivery
It prevents designers from creating their own model
It prevents technology in one layer from affecting other layers.
What is the purpose of protocols in data communications?
specifying the bandwidth of the channel or medium for each type of communication
providing the rules required for a specific type of communication to occur
dictating the content of the message sent during communication
specifying the device operating systems that will support the communication
Which logical address is used for delivery of data to a remote network?
source MAC address
destination MAC address
destination port number
source IP address
destination IP address
Which two protocols function at the internet layer?
PPP
ICMP
BOOTP
IP
POP
Which layer of the OSI model defines services to segment and reassemble data for individual communications between end devices?
network
transport
application
session
presentation
What process is used to place one message inside another message for transfer from the source to the destination?
encapsulation
flow control
decoding
access control
What is done to an IP packet before it is transmitted over the physical medium?
It is tagged with information guaranteeing reliable delivery
It is encapsulated in a Layer 2 frame
It is segmented into smaller individual pieces
It is encapsulated into a TCP segment
A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?
Ethernet, IP, TCP, HTTP
HTTP, IP, TCP, Ethernet
Ethernet, TCP, IP, HTTP
HTTP, TCP, IP, Ethernet
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
network layer
data link layer
physical layer
presentation layer
What type of cable is used to connect a workstation serial port to a Cisco router console port?
crossover
coaxial
rollover
straight-through
Why are two strands of fiber used for a single fiber optic connection?
They prevent crosstalk from causing interference on the connection
They allow for full-duplex connectivity
They increase the speed at which the data can travel
The two strands allow the data to travel for longer distances without degrading
Which procedure is used to reduce the effect of crosstalk in copper cables?
requiring proper grounding connections
wrapping the bundle of wires with metallic shielding
designing a cable infrastructure to avoid crosstalk interference
avoiding sharp bends during installation
twisting opposing circuit wire pairs together
A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?
The end-user device needs mobility when connecting to the network.
The end-user device requires a dedicated connection because of performance requirements.
The end-user device only has an Ethernet NIC.
The end-user device area has a high concentration of RFI.
Which type of UTP cable is used to connect a PC to a switch port?
crossover
straight-through
rollover
console
What is the definition of bandwidth?
the speed at which bits travel on the network
the amount of data that can flow from one place to another in a given amount of time
the measure of usable data transferred over a given period of time
What is a characteristic of UTP cabling?
cladding
immunity to electrical hazards
cancellation
woven copper braid or metallic foil
A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What is a possible cause of the signal distortion?
the number of wireless devices that are used in the wireless LAN
the elevated location where the wireless LAN was installed
the large number of trees that surround the office
the microwave oven
What is the purpose of the OSI physical layer?
exchanging frames between nodes over physical network media
performing error detection on received frames
controlling access to media
transmitting bits across the local media
Which characteristic describes crosstalk?
the loss of wireless signal over excessive distance from the access point
the distortion of the network signal from fluorescent lighting
the distortion of the transmitted messages from signals carried in adjacent wires
the weakening of the network signal over long cable lengths
What is indicated by the term throughput?
the measure of the usable data transferred across the media
the capacity of a particular medium to carry data
the time it takes for a message to get from sender to receiver
the measure of the bits transferred across the media over a given period of time
the guaranteed data transfer rate offered by an ISP
Which standards organization oversees development of wireless LAN standards?
IEEE
TIA
IANA
ISO
What is the binary representation for the decimal number 173?
10100101
10101101
10110101
10100111
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
236.17.12.10
236.17.12.6
234.16.12.10
234.17.10.9
How many binary bits exist within an IPv6 address?
64
256
48
128
32
What is the binary equivalent of the decimal number 232?
11101000
11110010
10011000
11000110
Which IPv4 address format was created for ease of use by people and is expressed as 201.192.1.14?
binary
dotted decimal
hexadecimal
ASCII
What is the decimal equivalent of the hex number 0x3F?
87
93
63
77
How many bits are in an IPv4 address?
32
64
256
128
What identifier is used at the data link layer to uniquely identify an Ethernet device?
UDP port number
IP address
MAC address
TCP port number
sequence number
What attribute of a NIC would place it at the data link layer of the OSI model?
TCP/IP protocol stack
attached Ethernet cable
RJ-45 port
MAC address
Which two engineering organizations define open standards and protocols that apply to the data link layer?
Internet Society (ISOC)
Institute of Electrical and Electronics Engineers (IEEE)
Electronic Industries Alliance (EIA)
Internet Assigned Numbers Authority (IANA)
International Telecommunication Union (ITU)
What is true concerning physical and logical topologies?
Physical topologies are concerned with how a network transfers frames.
Logical topologies refer to how a network transfers data between devices.
The logical topology is always the same as the physical topology.
Physical topologies display the IP addressing scheme of each network
What method is used to manage contention-based access on a wireless network?
CSMA/CA
token passing
CSMA/CD
priority ordering
A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?
hierarchical
bus
ring
mesh
star
Which statement describes the half-duplex mode of data transmission?
Data that is transmitted over the network flows in one direction at a time.
Data that is transmitted over the network can only flow in one direction.
Data that is transmitted over the network flows in both directions at the same time.
Data that is transmitted over the network flows in one direction to many different destinations simultaneously
Which is a function of the Logical Link Control (LLC) sublayer?
to identify which network layer protocol is being used
to accept segments and package them into data units that are called packets
to provide data link layer addressing
to define the media access processes that are performed by the hardware
Which data link layer media access control method does Ethernet use with legacy Ethernet hubs?
token passing
determinism
CSMA/CD
turn taking
What are the two sublayers of the OSI model data link layer?
LLC
network access
physical
MAC
internet
Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
application
data link
transport
physical
What type of physical topology can be created by connecting all Ethernet cables to a central device?
bus
ring
star
mesh
What are two services performed by the data link layer of the OSI model?
It fragments data packets into the MTU size.
It accepts Layer 3 packets and encapsulates them into frames.
It determines the path to forward packets.
It provides media access control and performs error detection.
It monitors the Layer 2 communication by building a MAC address table.
Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?
the use of Gigabit Ethernet speeds
the development of half-duplex switch operation
the virtually unlimited availability of IPv6 addresses
the use of full-duplex capable Layer 2 switches
the use of CSMA/CA
Which two characteristics describe Ethernet technology?
It uses unique MAC addresses to ensure that data is sent to the appropriate destination.
It uses a ring topology.
It typically uses an average of 16 Mbps for data transfer rates.
It is supported by IEEE 802.5 standards.
It is supported by IEEE 802.3 standards
What statement describes a characteristic of MAC addresses?
They are added as part of a Layer 3 PDU.
They have a 32-bit binary value.
They must be globally unique.
They are only routable within the private network.
What is the special value assigned to the first 24 bits of a multicast MAC address transporting an IPv4 packet?
01-5E-00
FF-FF-FF
01-00-5E
FF-00-5E
What will a host on an Ethernet network do if it receives a frame with a unicast destination MAC address that does not match its own MAC address?
It will forward the frame to the next host.
It will remove the frame from the media.
It will discard the frame.
It will strip off the data-link frame to check the destination IP address.
Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?
router
hub
repeater
switch
Which network device has the primary function to send data to a specific destination based on the information found in the MAC address table?
modem
switch
router
hub
Which function or operation is performed by the LLC sublayer?
It communicates with upper protocol layers
It adds a header and trailer to a packet to form an OSI Layer 2 PDU.
It performs data encapsulation
It is responsible for media access control
What happens to runt frames received by a Cisco Ethernet switch?
The frame is broadcast to all other devices on the same network.
The frame is dropped.
The frame is sent to the default gateway.
The frame is returned to the originating network device.
What addressing information is recorded by a switch to build its MAC address table?
the source Layer 2 address of incoming frames
the source Layer 3 address of outgoing packets
the destination Layer 2 address of outgoing frames
the destination Layer 3 address of incoming packets
What type of address is 01-00-5E-0A-00-02?
an address that reaches one specific host
an address that reaches every host inside a local subnet
an address that reaches every host in the network
an address that reaches a specific group of hosts
Which statement is true about MAC addresses?
The first three bytes are used by the vendor assigned OUI.
The ISO is responsible for MAC addresses regulations.
A NIC only needs a MAC address if connected to a WAN.
MAC addresses are implemented by software.
What are the two sizes (minimum and expected maximum) of an Ethernet frame?
1518 bytes
56 bytes
128 bytes
64 bytes
1024 bytes
Which two functions or operations are performed by the MAC sublayer?
It performs the function of NIC driver software.
It handles communication between upper and lower layers.
It adds a header and trailer to form an OSI Layer 2 PDU.
It adds control information to network protocol layer data.
It is responsible for Media Access Control.
Which command can be used on a Windows host to display the routing table?
tracert
netstat -s
show ip route
netstat -r
What information is added during encapsulation at OSI Layer 3?
source and destination MAC
source and destination application protocol
source and destination IP address
source and destination port number
How does the network layer use the MTU value?
The network layer depends on the higher level layers to determine the MTU.
To increase speed of delivery, the network layer ignores the MTU.
The network layer depends on the data link layer to set the MTU, and adjusts the speed of transmission to accommodate it.
The MTU is passed to the network layer by the data link layer.
Which characteristic describes an IPv6 enhancement over IPv4?
The IPv6 header is simpler than the IPv4 header is, which improves packet handling.
IPv6 addresses are based on 128-bit flat addressing as opposed to IPv4 which is based on 32-bit hierarchical addressing.
Both IPv4 and IPv6 support authentication, but only IPv6 supports privacy capabilities.
The IPv6 address space is four times bigger than the IPv4 address space.
Which statement accurately describes a characteristic of IPv4?
IPv4 has a 32-bit address space.
All IPv4 addresses are assignable to hosts.
An IPv4 header has fewer fields than an IPv6 header has.
IPv4 natively supports IPsec
When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?
dest MAC address
source IP address
source MAC address
dest IP address
A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?
The packet will be sent to the default gateway first, and then, depending on the response from the gateway, it may be sent to the destination host.
The packet will be sent only to the default gateway.
The packet will be sent directly to the destination host.
The packet will first be sent to the default gateway, and then from the default gateway it will be sent directly to the destination host.
Which IPv4 address can a host use to ping the loopback interface?
127.0.0.1
126.0.0.0
127.0.0.0
126.0.0.1
When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?
The best-effort delivery process guarantees that all packets that are sent are received.
Network layer IP protocols manage the communication sessions if connection-oriented transport services are not available.
Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host.
Connectionless acknowledgements are used to request retransmission.
What was the reason for the creation and implementation of IPv6?
to relieve IPv4 address depletion
to allow NAT support for private addressing
to make reading a 32-bit address easier
to provide more address space in the Internet Names Registry
Which information is used by routers to forward a data packet toward its destination?
source IP address
source data-link address
dest IP address
dest data-link address
Which field in an IPv4 packet header will typically stay the same during its transmission?
Packet Length
Time-to-Live
Dest Address
Flag
Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?
No Route to Destination
Hop Limit
TTL
Address Unreachable
What is the prefix length notation for the subnet mask 255.255.255.224?
/27
/28
/25
/26
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
192
190
64
62
254
Which subnet mask would be used if 5 host bits are available?
255.255.255.128
255.255.255.240
255.255.255.0
255.255.255.224
A network administrator subnets the 192.168.10.0/24 network into subnets with /26 masks. How many equal-sized subnets are created?
8
16
64
4
1
Which statement is true about variable-length subnet masking?
Subnets may only be submitted one additional time.
The size of each subnet may be different, depending on requirements.
Bits are returned, rather than borrowed, to create additional subnets.
Each subnet is the same size.
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify faulty frames
to identify the broadcast address of the destination network
to identify the host address of the destination host
to identify the network address of the destination network
How many usable IP addresses are available on the 192.168.1.0/27 network?
32
30
254
16
62
Which two parts are components of an IPv4 address?
logical portion
subnet portion
host portion
network portion
physical portion
What does the IP address 172.17.4.250/24 represent?
multicast address
broadcast address
host address
What is the purpose of the subnet mask in conjunction with an IP address?
to determine the subnet to which the host belongs
to mask the IP address to outsiders
to uniquely identify a host on a network
to identify whether the address is public or private
