5-8 quiz
what is the network address of Host A if the IPv4 address and subnet mask are 10.5.4.100 and 255.255.255.0
10.5.4.0
what are the IPv4 addresses that would be on the same network as host a if host a has an address and subnet mask of 10.5.4.100 and 255.255.255.0
10.5.4.1 and 10.5.4.99
how much data can be encapsulated into a normal sized ethernet frame before it is sent over the network?
46 to 1500 bytes
what is the message a host will send to determine the mac address of another host?
ARP request
the destination mac address of an ethernet broadcast in hexadecimal is
FFFF.FFFF.FFFF
which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF
which destination address will the router use to encapsulate the ether net frame when forwarding a packet?
MAC address of the destination host
T/F: adding a switch to a network will increase the size of the broadcast domain
True
a default route is the interface through which the router forwards
a packet containing a destination IP address on a different network
which design layer provides connectivity to devices on an ethernet lan
access
name two differences between binary and decimal numbers
binary numbers are based on powers of 2 and decimal numbers include 0-9
what are three characteristics of a multicast transmission
can be used by routers to exchange routing info, a single packet can be sent to a group of hosts, routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255
which class addresses were used by customers to assign addresses
class a, b, and c
what type of IPv4 address was obsoleted in the 1990s
classful
a router recieves a packet from the gigabit 0/0 interface and determines that the packet needs to be forwarded out the gigabit 0/1 interface. What will the router do next?
create a new layer 2 ethernet frame to be sent to the destination
what information in the IP packet does the router use to determine which information to forward the packet
destination IP address
which information is used by routers to forward a data packet toward its destination
destination IP address
ethernet switches make their forwarding decision based on what field of the ethernet frame
destination mac address
which term refers to the process of placing one message format inside another message format
encapsulation
T/F: classful addressing is an efficient method of allocating IPv4 addresses
false
when a switch receives an ethernet frame and the destination mac address of that frame is not in its mac address table the switch will do what?
forward the frame out all ports except in the incoming port
when an ethernet switch receives a frame that is broadcast it will do what
forward the frame out all ports except the incoming port
what is the purpose of the core layer in the cisco hierarchical network design model
high-speed backbone switching
which portion of an ip address uniquely identifies that device on that network?
host?
in implementing a LAN in a corporation what are three advantages of dividing hosts between multiple networks connected by a distribution layer?
it makes the host invisible to those on other local network segments, it provides increased security, and it splits up broadcast domains and decreases traffic
The Ethernet protocol is at what layer of the OSI Model?
layer 2 data link
an ethernet mac address is considered what kind of address
physical
which address type does not change when a device is connected to a new network
physical
Which Ethernet frame field indicates the beginning of an Ethernet frame?
preamble and sfd
name three devices that need an ip address
printer with an integrated NIC, a server with two NICs, and an IP phone
which network device can serve as a boundary to divide a layer 2 broadcast domain?
router
what role does a router play on a network
selecting the path to destination networks
ethernet switches add entries to their mac address table based on what field of the ethernet frame
source mac address
which network device has the primary function to send data to a specific destination based on the information found in the MAC address table
switch
what will a router do if it cannot determine where to forward an incoming packet
the router will drop it
why does a layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify the network address of the destination network
what is the purpose of ARP in an IPv4 network
to obtain a specific MAC address when an IP address is known
T/F: if host A has an IP packet to send to host B and host A has determined that Host B is on a different network, host A will encapsulate the IP packet in an Ethernet frame with the destination MAC address of its default gateway
true
which IP address type is intended for a specific host?
unicast
what is the network address of Host A if the IPv4 address and subnet mask are 172.16.4.100 and 255.255.0.0
172.16.0.0
which network does a host with IP address 172.32.65 reside on if it is using a default subnet mask?
172.32.0.0
A network design engineer has been asked to design the IP addressing scheme for a customer network. The network will use IP addresses from the 192.168.30.0/24 network. The engineer allocates 254 IP addresses for the hosts on the network but excludes 192.168.30.0/24 and 192.168.30.255/24 IP addresses. Why must the engineer exclude these two IP addresses?
192.168.30.0/24 is the network IP address and 192.168.30.255/24 is the IP broadcast address
which three fields are found in an 802.3 ethernet frame?
destination physical address, frame check sequence, source physical address
what type of rout is indicated by the code C in an IPv4 routing table on a cisco router
directly connected route
The process of prepending protocol information with information from another protocol is called:
encapsulation
When an Ethernet frame is sent out an interface, the destination MAC address indicates:
the mac address of the device, which is on the network, that will receive the ethernet frame
what is in the ARP reply that the host needs to know to communicate with the other host?
the missing MAC address
when IPv4 is configured for a computer on a network, what does the subnet mask identify
the part of the IP address that identifies the network
what is the equivalent decimal value given a binary number of 11001010
202
which address prefix range is reserved for IPv4 multicast?
224.0.0.0 - 239.255.255.255
how many usable hosts are available given a class C IP address with the default subnet mask
254
which two devices would commonly be found at the access layer of the hierarchical enterprise LAN design model
layer 2 switch and access point
what type of address is an IP?
logical
which portion of the network layer address does a router use to forward packets?
network portion
How is an ARP request sent out?
sent out as a broadcast so all devices on the same network will receive it
what information does an ethernet switch examine and use to build its address table
source MAC address
during the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry
switch the packet to the directly connected interface
if a host receives an ARP request, it will return an ARP reply if
the IP address in the ARP request matches its own MAC addresses
which address should be configured as the default gateway address of a client device
the IPv4 address of the router interface that is connected to the same LAN
