Worksheetsnwc 221-240
Total questions: 22
Worksheet time: 12mins
In order to maximize the usage of limited IP addresses, which of the following protocol is commonly used
NAT
DHCP
Both of the above
None of the above
The internet protocol allows IP fragmentation so that datagrams can be fragmented into pieces small enough to pass over a link with a smaller MTU than the original datagram size
t
f
Which of the following statement is correct for IPv6
Addresses are not hierarchical and are randomly assigned
There are 2.7 billion available addresses
Broadcast in IPv4 have been replaced with multicast in IPv6
Does not support multiple multiple IPv6 address per interface
Bootstrap Protocol (BOOTP) allows a diskless workstation to be remotely booted up in a network with TCP port designation for both client and server
t
f
In NAT operations, which of the following statements are correct
NAT maps each private IP address and port number into shared global IP address and available port number
Hosts inside private networks generate packets with private IP address and TCP/UDP port numbers
Translation table allows packets to be routed unambiguously
Translation table allows packets to be routed ambiguously
Packet is to be forwarded to a network with MTU of 592 bytes. The packet has an IP header of 20 bytes and a data part of 1484 bytes. Which of following maximum data length per fragment is legitimate?
592
572
568
562
What information is used as the entry of the lookup table in a Network Address Translation box?
UDP port number
IP address
All of the above
TCP port number
IPv6 allows fragmentation at
Source only
Intermediate routers only
Both source and intermediate routers
None of the above
Which of following fields that IPv6 dropped from IPv4?
Header length
Header checksum
All of the above
ID/flags/frag offset
in practical IPv6 application, a technology encapsulates IPv6 packets inside IPv4 packets, this technology is called
Routing
IP tunneling
Network address translation
Dynamic host configuration protocol
Which fields in IP packet provide for fragmentation of datagrams to allow differing MTUs in the internet
Type of service
Fragmentation offset
Identification
Flags
IPv6 has a much larger space of
2^8
2^16
2^32
2^128
Which of these statements are true of IPv6 representation
The first 64 bits represent the dynamically created interface ID.
Leading zeros in an IPv6 16 bit hexadecimal field are mandatory
A single interface may be assigned multiple IPv6 addresses of any type
Every IPv6 interface contains at least one loopback address
Which of the following statement is true for DHCP
Used extensively to assign temporary IP addresses to hosts
Allows ISP to maximize usage of their limited IP addresses
Time threshold to enforce lease time
All of the above
In Network Address Translation (NAT), which of the following statement is true for a packet with an associated private IP address at the routers in the global internet
Discarded due to the nature of the packet address
Redirected to other routers for address confirmation
Create an exception and then forward the packet to the destination address in the header
Forwarded to the destination address in the packet header
Which of following control is enabled in UDP?
Flow control
Error control
Congestion control
None of the above
Which of following information is not used in UDP de-multiplexing?
Source IP address
Destination IP address
Source port number
Destination port number
TCP adopts selective repeat ARQ protocol for flow control. In TCP flow control implementation, the window slides at
Per-packet basis
Per-byte basis
Per-bit basis
None of the above
Which flag bit in TCP header must be set when a TCP client initiates a three-way handshake?
SYN
ACK
RST
None of the above
Which flag bit in TCP header must be set when a TCP entity wants to terminate a connection?
FIN
SYN
RST
ACK
In Transmission Control Protocol (TCP), When a segment carries a combination of data and control information, it uses a
Sequence Number
Source Number
Slot Number
Port Number
Transmission Control Protocol (TCP), has same Checksum controlling like
TCP/IP
ICMP
UDP
IP
