Fundamentals of IPv4 Addressing and Routing Flashcards
Each router keeps an IP ______ ______. This table lists IP address groupings, called IP networks and IP subnets.
routing table
IP __________ __________ _________ dynamically learns the data link address of an IP host connected to a LAN.
Address Resolution Protocol (ARP)
An ___ _____ is any device that has at least one interface with an IP address can send and recieve IP packets.
IP host
The term ______ is just a vendorneutral term for byte.
octet
Each ______ has four decimal octets, seperated by periods.
Dotted-deciamal notation (DDN)
The range of decimal numbers in each octet is betweeen __ and ____
0 and 255
True or False
All IP address in the same group must not be seperated from each oter by a router.
True
True or False
IP address seperated from each other by a router must be in different groups
True
Class A gets roughly half of the IPv4 address space, with all DDN numbers that begin with?
1-126
Class B gets one-fourth of the address space, with all DDN numbers that begin with?
128-191
Class C gets one-eighth of the address space, with all numbers that begin with?
192-223
The _______ ______ is just one reserved DDN value per network that identifies the IP network.
Network Identifier (network ID)
With Class C networks and addresses, the first ____ octets define the group.
three
With Class A networks and addresses, the ____ octet defines the group.
first
With Class B networks and addresses, the first ____ octets define the group.
two
What is the first step of the Router Forwarding Logic?
Step 1. Use the data link Frame Check Sequence (FCS) field to ensure that the frame had no errors; if errors occured, discard the frame.
What is the second step of the Router Forwarding Logic?
Step 2. Assuming that the frame was not discarded at Step 1, discard the old data link header and trailer, leaving the IP packet.
What is the third step of the Router Forwarding Logic?
Step 3. Compare the IP packet’s destination IP address to the routing table, and find the route that best matches the destination address. This route identifies the outgoing interface of the router, and possibly the next-hop router IP address.
What is the fourth step of the Router Forwarding Logic?
Step 4. Encapsulate the IP packet inside a new data link header and trailer, appropriate for the outgoing interface, and forward the frame.
TCP/IP defines the _______ ________ ________ as the method by which any host or router on a LAN can dynamically learn the MAC address of another IP host or router on the same LAN.
Address Resolution Protocol (ARP)
ARP defines a protocol that includes the ARP Request, which is a message that asks the simple request ___________.
“if this is your IP address, please reply with your MAC address”
Which of the following are funtions of OSI Layer 3 protocols? (choose two)
a. Logical addressing
b. Physical addressing
c. Path selection
d. Arbitration
e. Error recovery
a. Logical addressing
c. Path selection
Imagine that PC1 needs to send some data to PC2, and PC1 and PC2 are separated by several routers. Both PC1 and PC2 sit on different Ethernet LANs. What are the larger entities (in size) that make it from PC1 to PC2? (choose two)
a. Frame
b. Segment
c. Packet
d. L5 PDU
e. L3 PDU
f. L1 PDU
c. Packet
e. L3 PDU
Which of the following is a valid Class IP address that can be assigned to a host?
a. 1.1.1.1
b. 200.1.1.1
c. 128.128.128.128
d. 224.1.1.1
b. 200.1.1.1