revision de conceptos
TRANSCRIPT
CCNA 1 Championship
Cisco UNACHNetworking Academy
Binary, Binary, Hex, and Hex, and
SubnettingSubnetting
NetworkNetworkConceptsConcepts
Electricity Electricity andand
ComponentsComponentsCablingCabling Odds andOdds and
EndsEnds
100 100 100 100 100
200 200 200 200 200
300 300 300 300 300
400 400 400 400 400
500 500 500 500 500
600 600 600 600
700 700 700 700 700
600
What is 1965 in hex?
7AD
Binary, Hex, and Subnetting100
Binary, Hex, and Subnetting200
What is 186 in binary?
10111010
What are networks with a subnet mask of .224 incremented by? (i.e. 255.224.0.0)
.32
Binary, Hex, and Subnetting300
Binary, Hex, and Subnetting400
When the subnet mask of 255.255.255.248 is assigned to a Class A address, how many usable IP addresses are available for hosts?
6
What network is host 10.228.10.60 /16 on?
DAILY DOUBLEDAILY DOUBLEDAILY DOUBLEDAILY DOUBLE
10.228.0.0
Binary, Hex, and Subnetting500
255.255.255.192 /26
If you had a Class B address and needed 1,000 subnets, what mask would need to be applied? What is the / notation?
Binary, Hex, and Subnetting600
255.255.255.224
A small company has a Class C network license and needs to create six subnets, each subnet capable of accommodating at least 20 hosts. What subnet mask would be used?
Binary, Hex, and Subnetting700
Network Concepts100
What are some key features of the TCP/IP Transport layer?
• uses TCP and UDP protocols• uses flow control through sliding
windows• provides reliability through sequence
numbers
Network Concepts200
What 3 protocols are used by e-mail to transfer data between clients and servers and between servers?
• POP3• IMAP4• SMTP
Network Concepts300
Name 3 routed protocols. Name 3 routing protocols.Which are Cisco’s proprietary routing protocols?
• Routed—IP, IPX, DecNet, XNS, Appletalk• Routing—RIPv1, RIPv2, IGRP, EIGRP,
OSPF, BGP, IS-IS• IGRP, EIGRP
Network Concepts400
Name 3 things that can cause a network condition called “broadcast radiation.”
• video over IP applications• ARP requests• RIP updates
Network Concepts500
What does the Spanning Tree Algorithm resolve?
switching loops
Network Concepts600
How does a device on a network find the MAC address of another device AND which term describes an ARP response by a router on behalf of a requesting host?
•It broadcasts an ARP request.
•proxy ARP
Network Concepts700
What are the 4 encapsulation units and their associated OSI model layers?
Segments—Transport LayerPackets—Network LayerFrames—Data Link LayerBits—Physical Layer
Electricity and Components100
Describe Coulomb's law.
• Opposite charges react to each other with a force that causes them to be attracted to each other (positive to negative)
• Like charges react to each other with a force that causes them to repel each other (negative to negative)
Electricity and Components 200
What are some good conductors of electricity? (Name at least 3.)
Copper, silver, gold, solder
Electricity and Components 300
Describe Direct Current.
• DC always flows in the same direction.• DC voltages always have the same
polarity. • The flow of electrons is always from a
negatively charged source to a positively charged source.
Electricity and Components 400
Describe Alternating Current.
• AC flows in one direction.
• AC voltage reverses its polarity, so that the positive terminal becomes negative, and the negative terminal becomes positive.
Electricity and Components 500
Describe a MAC address.Describe an IP address. Which octet describes the network portion of an address?
• MAC--twelve hexadecimal digits (48 bits)• MAC—6 digits OUI, 6 digits vendor
assigned• IP—32 dotted decimal format
• Class A, Nhhh; Class B, NNhh; Class C, NNNh
Electricity and Components 600
Which wireless standard increased transmission capabilities to 11 Mbps?
• 802.11b
Electricity and Components 700
What command will test the internal loopback of a node?
ping 127.0.0.1
Cabling100
During cable testing, what two things are used to calculate the information carrying capacity of a data cable?
• attenuation• analog bandwidth
Cabling200
Where should the highest capacity Ethernet technologies be implemented in a network? (List 3.)
• between backbone switches• between enterprise server and switch• on aggregate access links
Cabling300
What networking media offers high security, long distance, and is unaffected by electrical noise?
fiber
Cabling400
How does adding more hubs to a network (and connecting workstations to those hubs) affect collision domains?
The size of the collision domain is extended.
Cabling500
Which three things are common to all 100BASE technologies?
• frame formatting• timing• multi-part encoding
Cabling600
What type of cable is used between a terminal and router’s console port?Between a switch and a switch?Between a workstation and a hub?
• rollover• crossover• straight-through
Cabling700
In 10Base2, describe what the 10 represents, then what Base represents, then what 2 represents.
• 10 Mbps• baseband signaling• 200 meters (185)
Odds and Ends100
file size and bandwidth of link
What is two things are required to compute the estimated time it would take to transfer data from one location to another?
Odds and Ends200
How long would it take a 10MB file to be sent over a T1 connection?
52 secs (T=S/BW)
Odds and Ends300
What does 1000BASE-T use to accomplish gigabit speeds on Cat 5e cable?
the use of all four pairs of wires in full-duplex mode, simultaneously
Odds and Ends400
What kind of wiring is Ethernet considered the standard for? (Think of standards.)
• inter-building• vertical• horizontal
Odds and Ends500
An ISDN Basic Rate Interface (BRI) is composed of how many signaling channels? How many data channels?
1 signal channel (Delta channel) 16 kpbs2 data channels (Bearer channels) 64 kpbs each
Odds and Ends600
What devices are associated with the Physical layer, the Data Link layer, and the Network layer of the OSI model?
• Physical layer—patch panels, connectors, media, hubs, repeaters
• Data link layer—NICs, switches, bridges• Network layer--routers
TFTP and FTP
If a network administrator needed to download files from a remote server, which protocols could the administrator use to remotely access those files?
Odds and Ends700