Homework Review Flashcards
Which physical layer transceiver module standard is the oldest?
GBIC
Which layer of the OSI model provides an entry point for programs to access the network infrastructure?
Application Layer
Which layers do hubs operate on?
Layer 1 (physical)
Which layers do bridges operate on?
Layer 2 (Data Link)
Which IEEE Ethernet specification defines a maximum distance of 550 meters at 1 Gbps?
1000BaseSX
Which layer of the OSI model does agreement and translation occur?
Layer 6 (Presentation)
How many wires are used in a 100BaseTX UTP transmission?
Four
What role does encapsulation perform during communications?
Describes how data should be packaged
Which layer of the OSI model is responsible for code and character-set conversion as well as recognizing data formats?
Layer 6 (Presentation)
Reliable delivery of data packets is associated with what layer of the OSI model?
Layer 4 (Transport)
A large number of packet collisions, late collisions, cyclical redundancy checks errors, and runt frames are a sign of what?
Duplex mismatch
Which layer of the OSI model is a PDU referred to as a frame?
Layer 2 (Data Link)
What can cause a computer system to have sporadic connectivity to network services?
Duplicate IP
During an ARP, if a computer isnt receiving traffic, what could be the problem?
Duplicate MAC Address
What kind of utility is a TCP Dump?
Packet Analyzer
Internet Protocol (IP) operates in which layer of the OSI Model?
Layer 3 (Network)
What is a demarcation point?
Line of responsibility between a service provider and a customer.
What does the mac address FF:FF:FF:FF:FF:FF indicate?
Multicast traffic
What is the Class A private address range?
10.0.0.0 - 10.255.255.255
What is the class B private address range?
172.16.0.0 - 172.31.255.255
What is the class C private address range?
192.168.0.0 - 192.168.255.255
What is the APIPA address range?
169.254.0.0 - 169.254.255.255
What is step 1 of the troubleshooting methodology?
ID problem
What is step 2 of the troubleshooting methodology?
Establish theory of probably cause
What is step 3 of the troubleshooting methodology?
Test theory to determine the cause
What is step 4 of the troubleshooting methodology?
Establish plan of action to resolve the problem
What is step 5 of the troubleshooting methodology?
Implement the solution or escalate as necessary
What is step 6 of the troubleshooting methodology?
Verify full system functionality and, if applicable, implement preventive measures
What is step 7 of the troubleshooting methodology?
Document findings, actions, and outcomes
How big is a payload?
1500 bytes
What is a Link-state routing protocol?
A type of routing protocol that calculates the best path between source and destination nodes based on a map of network connectivity between nodes.
What is a distance-vector routing protocol?
A type of routing protocol that determines the best route for data packets based on the lowest number of hops.
A manually configured routing table entry is referred to as what?
A static route
Which type of equipment should be used for telecommunications equipment and have an open design?
2/4 post racks
What is ARP poisoning?
ARP poisoning reroutes data and allows an attacker to intercept packets of data intended for another recipient.
What is a BCP (business continuity plan)?
A BCP is a plan to help ensure that business processes can continue during a time of emergency or disaster.
What is DOCSIS (Data Over Cable Service Interface Specification)?
DOCSIS is an international telecommunications standard that permits the addition of high-bandwidth data transfer to an existing cable television system. “Cable Modems”
What is channel bonding?
Channel bonding is used to reduce redundancy or increase throughput, directly affecting the connection speed of a wireless connection.
What is the class A IP address range?
0-127
What is the class B IP address range?
128-191
What is the class C IP address range?
191-223
What refers to a system containing mappings of domain names to various types of data, such as numerical IP addresses?
DNS - Domain Name System
What is a trunk?
A physical connection used to carry multiple logical connections.
What do IPv6 multicast addresses begin with?
FF
What is a forward DNS lookup?
A forward DNS uses the domain name and returns with the appropriate IP. It obtains the IP.
What is a reverse lookup?
Reverse lookup uses the IP address and returns with the domain name. It obtains the domain name.
DNS record that specifies a list of additional name servers on a domain is called what?
NS - NS record type identifies other name servers for the domain.
Which protocol is built into Microsoft servers for remote access purposes?
RDP - Remote Desktop Protocol
Which devices provide the lowest latency and highest bandwidth for connectivity?
Switches
Which protocol is used to send emails?
SMTP - Simple Mail Transfer Protocol
