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Computer Networks → Introduction to Computer Networks 2

In _______ forwarding, the mask and destination addresses are both 0.0.0.0 in the routing table.
default
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A ________ is a local address. Its jurisdiction is over a local network.
physical
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Computer Networks → Types of Networks 2

In _______ forwarding, the destination address is a network address in the routing table.
network-specific
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If the sender is a host and wants to send a packet to another host on the same network, the logical address that must be mapped to a physical address is ______.
the destination IP address in the datagram header
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Computer Networks → Network Topologies 2

In _______ forwarding, the routing table holds the address of just the next hop instead of complete route information.
next-hop
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If the sender is a host and wants to send a packet to another host on another network, the logical address that must be mapped to a physical address is ______.
the IP address of the router found in the routing table
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Computer Networks → OSI Reference Model 2

The idea of address aggregation was designed to alleviate the increase in routing table entries when using ________.
classless addressing
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The sender is a router that has received a datagram destined for a host on another network. The logical address that must be mapped to a physical address is ______.
the IP address of the router found in the routing table
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Computer Networks → TCP/IP Model 2

The principle of ________ states that the routing table is sorted from the longest mask to the shortest mask.
longest mask matching
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The sender is a router that has received a datagram destined for a host on the same network. The logical address that must be mapped to a physical address is ______.
the destination IP address in the datagram header
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Computer Networks → Physical Layer 2

The use of hierarchy in routing tables can ________ the size of the routing tables.
reduce
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Which one of the following is not a function of network layer?
none of the above
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Computer Networks → Data Link Layer 2

An ARP reply is normally _______.
unicast
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The 4 byte IP address consists of
both (a) and (b)
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Computer Networks → Network Layer 2

An ARP request is normally _______.
broadcast
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In virtual circuit network each packet contains
a short VC number
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Computer Networks → Transport Layer 2

A technique called ______ is used to create a subnetting effect.
proxy ARP
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Which one of the following routing algorithm can be used for network layer design?
all of the above
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Computer Networks → Session Layer 2

A _______ is an ARP that acts on behalf of a set of hosts.
proxy ARP
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Multi-destination routing
data is not sent by packets
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Computer Networks → Presentation Layer 2

ICMP is a _________ layer protocol.
network
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A subset of a network that includes all the routers but contains no loops is called
spanning tree
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Computer Networks → Application Layer 2

ICMP messages are divided into two broad categories: _____________.
query and error reporting messages
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Which one of the following algorithm is not used for congestion control?
none
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Computer Networks → IP Addressing 2

An ICMP message has _____ header and a variable-size data section.
an 8-byte
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The network layer protocol of internet is
internet protocol
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Computer Networks → Subnetting 2

Which of the following is true about ICMP messages?
none is true
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ICMP is primarily used for
error and diagnostic functions
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Computer Networks → Routing Algorithms 2

IGMP is a companion to the ______ protocol.
None of the above
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The PDU of network layer is
packets
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Computer Networks → Switching Techniques 2

IGMP is _______ protocol.
a group management
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Which of the following is a wrong example of network layer?
X.25 level 2-ISO
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Computer Networks → DNS 2

The number of addresses in a class A block is _______.
16777216
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For data communications to occur, the communicating devices must be part of a communication system made up of a combination of?
Hardware and software
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Computer Networks → HTTP and HTTPS 2

The number of addresses assigned to an organization in classless addressing _______.
must be a power of 2
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Time required for a message to travel from one device to another is known as:
Transit time
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Computer Networks → FTP and SMTP 2

The first address assigned to an organization in classless addressing _______.
must be evenly divisible by the number of addresses
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Which network is a cross between circuits switched network and a data-gram network?
Virtual-circuit network
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Computer Networks → Wireless Networks 2

Which address could be the beginning address of a block of 32 classless addresses?
2.4.6.64
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Switching at the network layer in the Internet uses the datagram approach to:
Packet switching
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