Homework Review

Question 1

Which physical layer transceiver module standard is the oldest?

Answer 1

GBIC

Question 2

Which layer of the OSI model provides an entry point for programs to access the network infrastructure?

Answer 2

Application Layer

Question 3

Which layers do hubs operate on?

Answer 3

Layer 1 (physical)

Question 4

Which layers do bridges operate on?

Answer 4

Layer 2 (Data Link)

Question 5

Which IEEE Ethernet specification defines a maximum distance of 550 meters at 1 Gbps?

Answer 5

1000BaseSX

Question 6

Which layer of the OSI model does agreement and translation occur?

Answer 6

Layer 6 (Presentation)

Question 7

How many wires are used in a 100BaseTX UTP transmission?

Answer 7

Four

Question 8

What role does encapsulation perform during communications?

Answer 8

Describes how data should be packaged

Question 9

Which layer of the OSI model is responsible for code and character-set conversion as well as recognizing data formats?

Answer 9

Layer 6 (Presentation)

Question 10

Reliable delivery of data packets is associated with what layer of the OSI model?

Answer 10

Layer 4 (Transport)

Question 11

A large number of packet collisions, late collisions, cyclical redundancy checks errors, and runt frames are a sign of what?

Answer 11

Duplex mismatch

Question 12

Which layer of the OSI model is a PDU referred to as a frame?

Answer 12

Layer 2 (Data Link)

Question 13

What can cause a computer system to have sporadic connectivity to network services?

Answer 13

Duplicate IP

Question 14

During an ARP, if a computer isnt receiving traffic, what could be the problem?

Answer 14

Duplicate MAC Address

Question 15

What kind of utility is a TCP Dump?

Answer 15

Packet Analyzer

Question 16

Internet Protocol (IP) operates in which layer of the OSI Model?

Answer 16

Layer 3 (Network)

Question 17

What is a demarcation point?

Answer 17

Line of responsibility between a service provider and a customer.

Question 18

What does the mac address FF:FF:FF:FF:FF:FF indicate?

Answer 18

Multicast traffic

Question 19

What is the Class A private address range?

Answer 19

10.0.0.0 - 10.255.255.255

Question 20

What is the class B private address range?

Answer 20

172.16.0.0 - 172.31.255.255

Question 21

What is the class C private address range?

Answer 21

192.168.0.0 - 192.168.255.255

Question 22

What is the APIPA address range?

Answer 22

169.254.0.0 - 169.254.255.255

Question 23

What is step 1 of the troubleshooting methodology?

Answer 23

ID problem

Question 24

What is step 2 of the troubleshooting methodology?

Answer 24

Establish theory of probably cause

Question 25

What is step 3 of the troubleshooting methodology?

Answer 25

Test theory to determine the cause

Question 26

What is step 4 of the troubleshooting methodology?

Answer 26

Establish plan of action to resolve the problem

Question 27

What is step 5 of the troubleshooting methodology?

Answer 27

Implement the solution or escalate as necessary

Question 28

What is step 6 of the troubleshooting methodology?

Answer 28

Verify full system functionality and, if applicable, implement preventive measures

Question 29

What is step 7 of the troubleshooting methodology?

Answer 29

Document findings, actions, and outcomes

Question 30

How big is a payload?

Answer 30

1500 bytes

Question 31

What is a Link-state routing protocol?

Answer 31

A type of routing protocol that calculates the best path between source and destination nodes based on a map of network connectivity between nodes.

Question 32

What is a distance-vector routing protocol?

Answer 32

A type of routing protocol that determines the best route for data packets based on the lowest number of hops.

Question 33

A manually configured routing table entry is referred to as what?

Answer 33

A static route

Question 34

Which type of equipment should be used for telecommunications equipment and have an open design?

Answer 34

2/4 post racks

Question 35

What is ARP poisoning?

Answer 35

ARP poisoning reroutes data and allows an attacker to intercept packets of data intended for another recipient.

Question 36

What is a BCP (business continuity plan)?

Answer 36

A BCP is a plan to help ensure that business processes can continue during a time of emergency or disaster.

Question 37

What is DOCSIS (Data Over Cable Service Interface Specification)?

Answer 37

DOCSIS is an international telecommunications standard that permits the addition of high-bandwidth data transfer to an existing cable television system. "Cable Modems"

Question 38

What is channel bonding?

Answer 38

Channel bonding is used to reduce redundancy or increase throughput, directly affecting the connection speed of a wireless connection.

Question 39

What is the class A IP address range?

Answer 39

0-127

Question 40

What is the class B IP address range?

Answer 40

128-191

Question 41

What is the class C IP address range?

Answer 41

191-223

Question 42

What refers to a system containing mappings of domain names to various types of data, such as numerical IP addresses?

Answer 42

DNS - Domain Name System

Question 43

What is a trunk?

Answer 43

A physical connection used to carry multiple logical connections.

Question 44

What do IPv6 multicast addresses begin with?

Answer 44

FF

Question 45

What is a forward DNS lookup?

Answer 45

A forward DNS uses the domain name and returns with the appropriate IP. It obtains the IP.

Question 46

What is a reverse lookup?

Answer 46

Reverse lookup uses the IP address and returns with the domain name. It obtains the domain name.

Question 47

DNS record that specifies a list of additional name servers on a domain is called what?

Answer 47

NS - NS record type identifies other name servers for the domain.

Question 48

Which protocol is built into Microsoft servers for remote access purposes?

Answer 48

RDP - Remote Desktop Protocol

Question 49

Which devices provide the lowest latency and highest bandwidth for connectivity?

Answer 49

Switches

Question 50

Which protocol is used to send emails?

Answer 50

SMTP - Simple Mail Transfer Protocol