Quiz 10 Flashcards
(8 cards)
What service is provided by the network layer of the TCP/IP protocol stack?
Unreliable end-to-end multi-hop transfer of datagrams between hosts
Unreliable transfer of datagrams between hosts and routers
Reliable end-to-end transfer of datagrams between routers
Unreliable end-to-end multi-hop transfer of datagrams between hosts
How are IP addresses used in the Internet networking layer?
IP addresses are assigned to hosts and to routers
IP addresses are assigned only to hosts
IP addresses are assigned to network interfaces of hosts and network interfaces of routers
IP addresses are assigned to network interfaces of hosts and network interfaces of routers
What is the role of the forwarding function executed at the network layer
To transfer datagrams from incoming links to the appropriate outgoing link
To provide diagnostic information in case of network errors
To compute the least cost routes (paths) in the network
To transfer datagrams from incoming links to the appropriate outgoing link
What information can be found in a forwarding table of a router
Information about sources addresses and incoming communication links
Information about destination addresses and outgoing communication links
Information about the shortest paths routes in the network
Information about what communication links the router is connected to
Information about destination addresses and outgoing communication links
What is the role of the routing function executed at the network layer
To transfer datagrams from incoming links to the appropriate outgoing links
To compute the contents to be put into the forwarding tables of routers
To provide diagnostic information in case of network errors
To compute the contents to be put into the forwarding tables of routers
How many IP addresses are contained in the 223.1.1.0/23 CIDR-block of addresses
512
256
1
512
Consider a forwarding table with three entries
a. 11001000 00010111 00010* ***
b. 11001000 00010111 00011000 *******
c. 11001000 00010111 00011* ***
Given an IP datagram with destination address
11001000 00010111 00011000
Which forwarding table entry will be used to determine the outgoing link of the datagram
b
a
c
b
What is the Dynamic Host Configuration Protocol being used for
To exchange routing information
To map host names to IP addresses
To automatically configure a host network interface with an IP address
To automatically configure a host network interface with an IP address
