Lab 1 Flashcards
Why are some FastEthernet ports on the switches up and others are down?
When there are wires connected to the FastEthernet ports it sets the status of the port to up to show that it is in use. When the port is not connected it will be down.
What could prevent a ping from being sent between the PCs?
The firewall can prevent pings if it is enabled.
If the ip address is wrong
How do we prevent unauthorized individuals from viewing passwords in the configuration file?
To prevent this you should create a secret password. The command for this is: enable secret then write the password and hit enter.
What type of interface has no physical port associated with it? Which interface and in which devices this type of interface is used in this lab?
The loopback interface has no physical ports.
The loopback interface is found in routers.
Why does Wireshark show the actual MAC address of the local hosts, but not the actual MAC address for the remote hosts?
Wireshark will not show the physical address of the remote hosts because they are on different networks.
Frames exchanged between devices in different IP networks must be first forwarded to which network device the same LAN?
Router
What is used to determine the network portion of an IPv4 address?
Subnet Mask
What is the order of the two addresses in the data link frame?
Source data link address
Destination data link address
Why are two strands of fiber used for a single fiber optic connection?
Has the ability for full-duplex connectivity.
What is the definition of bandwidth?
The amount of data that can flow from one place to another in a given amount of time
Basically the rate of speed that data is sent between a given path.
What is indicated by the term throughput?
Throughput is the measure of the transfer of bits across the media over a given period of time.
Which standards organization oversees development of wireless LAN standards?
IEEE
What is the length in binary bits for IPv4 addresses and which numbering system is used to represent these addresses? In which layer of the OSI model is this type of address used?
IP Address Length is 32 bits
Represented by decimal
In the Internet Layer
What is the length in binary bits for IPv6 addresses and which numbering system is used to represent these addresses? In which layer of the OSI model is this type of address used?
IP Address Length is 128 bits
Represented by hexadecimal
In the Internet Layer
What is the length in binary bits for MAC addresses and which numbering system is used to represent these addresses? In which layer of the OSI model is this type of address used?
IP Address Length is 48 bits
Represented by hexadecimal
In the data-link layer
What is the difference between half-duplex and full-duplex communication methods and provide one example for each method?
half-duplex sends then receives (or the reverse), whereas full-duplex does both at once.
Examples:
Half Duplex - WLAN or Walkie talkies
Full Duplex - Telephones
Provide five services performed by the data link layer of the OSI model?
Framing, Addressing, Synchronization, Error Control, Flow Control
What are the two methods used for switching data between ports on a switch?
Store and forward switching.
Cut-through switching.
What feature automatically negotiates the best speed and duplex setting between interconnecting devices?
Autonegotiation
Explain why we may need to configure a layer 2 switch with a default gateway address, in addition, to configuring one of its SVI with an IP address and a subnet mask.
Allows remote management of the switch.
List three improvements provided by IPv6 as compared to IPv4.
Increases address size from being 32 bits to 128 bits.
Increased security
Better/Efficient Routing
List the three private address blocks of IPv4 and then identify the main difference between private and public IPv4 addresses.
- 0.0.0 - 10.255.255.255
- 16.0.0 - 172.31.255.255
- 168.0.0 - 192.168.255.255
Public ipv4 addresses are globally routed between ISP routers.
Whereas private addresses are ipv4s that can not be used on the internet.
List and briefly explain the two ways of how a router can learn about remote networks.
Static routing - Remote networks are manually entered into the route table using static routes
Dynamic Routing - Automatically learns about router information and adds the best route to its routing table.
Which field in an IPv4 packet is used by the router to determine if a packet has expired and should be dropped?
Time to Live field (TTL) indicates the maximum time the datagram is allowed to remain in the internet system.
