Quiz & Test Ch 9 - 12
When the UDP checksum is calculated for IPv6, what is the result if the checksum value is 0?
The 0 is changed to the FFFF hex value and placed in the UDP header.
When reviewing the output of an IPv6 route table on a dual-stack router and routing BGP, what would you expect to see? (Choose two.)
The AS of the peer router The IPV6 address of the peer router.
Copper, fiber optic cable, and wifi radio waves have an equal capacity to carry IPv4 and IPv6 traffic.
True
IPv6 headers put all optional Internet-layer data in extension headers.
True
In the first packet sent in the TCP three-step handshake used to set up a connection, the packet has just one flag set, the SYN flag, to indicate the packet is used to synchronize the sequence numbers between hosts.
True
Microsoft supports Intra-Site Automatic Tunnel Addressing Protocol (ISATAP), specified in RFC 5214.
True
Microsoft's DirectAccess is touted as an IPv6-only technology.
True
Which of the following are reasons to implement tunnels as part of an IPv6 migration? (Choose all that apply.)
You have two islands of IPv6 hosts separated by an IPv4 network. You have a dual-stack host connected to an IPv4 network, and it needs to talk to the rest of the IPv6 network. You have two islands of IPv4 hosts separated by an IPv6 network.
UDP is a simple protocol that is used by applications that do not contain their own connection-oriented timeout values and retry counters.
False
What is the proper response to a TCP connection termination?
Host 1 returns an ACK response.
The Teredo tunneling technology allows IPv6 and IPv4 traffic to specifically transition which of the following?
NAT
"Dual stack" refers to which of the following?
a system that is running both IPv4 and IPv6
In 6to4 addressing, what does the w.x.y.z colon hexadecimal notation represent?
a unicast IPv4 address
Of the following, which are valid Flags and their descriptions found in a TCP Flag field? (Choose all that apply.)
a. ACK (Acknowledgment) which is the acknowledgment number indicating the next expected number from the TCP peer. d. URG (Urgent) which indicates the Urgent Pointer field should be examined.
In the basic hybrid network model, which of the following is true for each site? (Choose all that apply.)
a. Each site is presumed to contain IPv6 individual nodes. b. Each site is presumed to possess a gateway that manages IPv6-to-IPv4 transition traffic.
In examining traffic on an ISATAP network using Wireshark, when a router solicitation packet is selected in the packet list pane, in the packet details pane, which of the following would you have to expand to view the Source and Destination fields for both IPv4 and IPv6 ISATAP addresses of the sending host?
a. Expand Internet Protocol Version 6 and then expand Internet Control Message Protocol v6.
What typically causes a TCP half-open connection?
a. Host 1 doesn't send the expected ACK packet.
Which of the following is true of a dual-IP layer architecture?
a. IPv4 and IPv6 operate in a single transport layer implementation.
The predicted adoption of IPv6 will likely follow what pattern?
a. IPv6 will first be adopted by smaller organizations.
Which of the following is true about ISATAP components? (Choose all that apply.)
a. ISATAP nodes can operate in IPv4 only and IPv6-capable networks. c. To communicate off the local network, an ISATAP node must tunnel to an ISATAP router. d. An ISATAP router must be the default router for all ISATAP hosts that have traffic that needs to be routed.
In describing encapsulators and decapsulators in IPv6/IPv4 tunneling configurations, which of the following sending and receiving device set ups can have tunneling configurations applied? (Choose all that apply.)
a. Router-to-router. b. Host-to-router and router-to-host. d. Host-to-host.
A potential IPv6 auto-configured transition interface could be?
a. an ISATAP interface.
Which of the following steps is not involved in enabling ISATAP on an IPv6 network?
adding an AAAA record for ISATAP in DNS
Which of the following have IPv6 routes?
all IPv6 nodes
Which statements define the boundary of the TCP sliding window mechanism? (Choose all that apply.)
all data that was acknowledged acknowledged data plus the receiver's window size
From which device does an ISATAP node receive the required address prefix?
an ISATAP Router
What must any 6to4 site possess in order for 6to4 addressing to occur?
at least one valid globally unique 32-bit IPv4 address
Of the following, when transitioning to IPv6, which software utilities will be required to report on and manage the network infrastructure? (Choose all that apply.)
b. Network management utilities. c. Network end-user applications. d. Network security software.
What are some of the roadblocks to using Network Address Translation (NAT) for IPv4/IPv6 translations? (Choose two.)
b. Real-time streaming audio or video. d. Voice over IP (VoIP).
What sequence of events signals the TCP Fast Recovery process?
three sets of duplicate ACKs
Why should you create and use a test lab?
to test designs and create standardized configurations to evaluate products to test applications as they are migrated to IPv6
Which tools should you include in a test lab? (Choose all that apply.)
traffic simulator jump box protocol analyzer
Which hybrid IPv4/IPv6 network model contains a complete mix of IPv4, IPv6, and IPv4/IPv6 networks, with no specific version of IP being favored at the core?
true hybrid network model
What is the initial size of the TCP congestion window?
twice the sender's MSS
When will a Teredo node fail Teredo server qualification?
when it is behind symmetric NAT
When must a Teredo node send a bubble packet?
when it is not behind NAT
Where can you get a block of IPv6 addresses if you are in the United States and plan to single-home your network?
your ISP
What range of addresses traditionally defines a well-known port address?
0-1023
How many link-local IPv6 addresses does a node have?
1 per interface
In Hands-On Project 12-1, which uses the ch12_Arpscan.pcapng trace file, which of the following hosts was discovered?
10.0.0.55
What range of addresses corresponds to the registered port numbers?
1024-49151
The TCP Options field is used to contain data considered optional in the TCP header. Of the following, which are valid TCP option values and their names? (Choose all that apply.)
2 Maximum Segment Size 4 Selective ACK ( SACK ) Permitted 8 Timestamps
For a 6to4 address prefix, how are the first 16 bits always expressed?
2002::/16
How many steps occur in the TCP handshake process?
3
In Hands-On Project 12-3, you created the Echo-port filter and applied it to the ch12_Portscan.pcapng trace file. How many packets appeared in the Wireshark window with the filter applied?
3
What range of addresses corresponds to the dynamic port numbers?
49152-65535
Which of the following are valid 6to4 components? (Choose all that apply.)
6 to 4 node 6 to 4 relay 6 to 4 router
For the 6to4 transition technology, which device is capable of forwarding 6to4 packets to both 6to4 nodes and IPv6 nodes across an IPv4 network infrastructure?
6to4 relay
Where can you get a block of IPv6 addresses if you are in the United States and plan to multihome your network?
ARIN
Which of the following is a valid reason to use stateful autoconfiguration?
Clients need to know their DNS server and domain suffix.
What will happen to a legacy IPv4 application that is not IPv6 native after you have upgraded your clients to be IPv6-only?
Clients will be unable to communicate with the application.
What is the DAD state of an IPv6 address on an interface that is not active?
Deprecated
You can determine which operating system is running on a computer by running a TCP-based port scan against the computer.
FALSE
Of the following, which packet type or types is a computer using dual-stack architecture capable of generating?
IPv6 or IPv4 packets
Which transition method supports the use of PRLs because it does not consider IPv4 routers capable of broadcasts?
ISATAP
A host is running IPv6. You connect the host to an IPv4 network with no IPv6 routers. What happens by default to the host?
It will only be able to talk to IPv6 nodes on its local link.
Which architecture has been developed on top of ISATAP?
RANGER
Which technology allows address translation between an IPv4 network domain and an IPv6 network domain through an XLAT translator?
SIIT
In Hands-On Project 12-2, the ch12_Portscan.pcapng trace file shows part of a TCP port scan. What flag(s) indicates an open port?
SYN/ACK
Which IPv6-over-IPv4 tunneling method supports address translation through NAT?
Teredo
You need to tunnel through NAT. Which of the following is the best choice?
Teredo
The total length of an IP packet containing a UDP header is 52 bytes. Of the following, which are true statements about the composition of these headers? (Choose all that apply.)
Th IP Header length is 20 bytes The data after the IP header is 32 bytes in length The UDP length is 32 bytes.
Although TCP is unchanged under IPv6, it is now required to include an IPv6 128-bit address from the IPv6 header. Since TCP checksums are required, it must use an IPv6 pseudo-header for the purpose. Of the following, what is in the pseudo-header? (Choose all that apply.)
Source address Destination address TCP length Next header
Which of the following TCP/IP protocols are Transport layer protocols? (Choose all that apply.)
TCP UDP
Which of the following statements best defines a half-open connection?
The handshake process does not end with a final ACK.
What is the first step a 6to4 network node must take when it wants to send a packet to a 6to4 node/router?
The node must resolve the 6to4 node/router's address.
When reviewing the output of a router's route summary on a dual-stack router and routing BGP, what would you expect to see?
The router-id in dotted-decimal
Of the following versions of Windows, which support an IPv4/IPv6 dual-stack configuration? (Choose all that apply.)
Windows Server 2012 Windows 10 Windows 7 Windows Server 8
Which of the following are reasons for upgrading to IPv6? (Choose all that apply.)
You are out of IPv4 addresses. You need features provided by IPv6.
In Hands-On Project 9-2: Examine the TCP Header in IPv4 and IPv6, Figure 9-27 shows a packet capture from a network using 6to4. With packet number 2 selected, in the main packet list pane, the Source and Destination addresses are clearly IPv6 addresses, but in the packet details pane next to Internet Protocol Version 4, the Src (Source) and Dst (Destination) addresses are IPv4. Of the following, which is the best explanation for how this has occurred?
b. The 6to4 source node encapsulated its IPv6 packet in an IPv4 header, so the IPv4 header has the node's IPv4 address, and the IPv6 packet inside has its IPv6 address. The destination node receives the packet at its IPv4 destination address, decapsulates the header and the IPv6 packet contains that nodes IPv6 address .
What is the major difference between how UDP runs over IPv4 and IPv6?
b. The UDP checksum is required rather than optional, so the IPv6 computer must calculate the checksum for the packet and the pseudo-header.
The Link-Local IPv6 address is assigned what IPv6 network prefix?
b. fe80::/64.
When reviewing the output of a bgp summary command on a dual-stack router and routing BGP, you would expect to see _______.
both IPv4 and IPv6 peers
The Interface ID (IID) created using the IEEE EUI-64 format, has padding of FFFE added to the 48 bit MAC address where?
c. In the middle of the 48 bit MAC address.
In Hands-On Project 9-1: Examine the UDP Header Structure found in the textbook, Figure 9-26 shows User Datagram Protocol expanded and that the Destination Port is (domain) 53. Of the following, what is the best description of this port?
c. It is the TCP and UDP well-known port number for DNS.
The local IPv6 route table should at least include an entry for which of the following interface types?
c. Loopback Pseudo-interface.
The prefix policy on a Windows 10 computer orders which IPv6 prefix as a higher precedence?
c. fc00::/7 as precedence 3 and 2002::/16 as precedence 30.
What is the IPv6 address of a loopback interface?
d. ::1/128.
On a command prompt on a Windows 10 computer, running the command netstat -sp udp to see connection statistics for UDP over IPv4, and then running netstat -sp udpv6 to see the connection status for UDP over IPv6 reveals what differences?
d. There is no difference in the statistics shown. Datagrams sent and received, receive errors, and no ports stat are available for IPv4 and IPv6.
What is the preferred method for migrating networks from IPv4 to IPv6?
dual stack
Which dual-stack architecture allows IPv4 and IPv6 at the Network layer to access a single TCP/UDP stack at the Transport layer?
dual-IP-layer architecture
Which of the following services does UDP provide?
identification of source and destination port addresses
Where is TCP data stored when it is received?
in the TCP buffer area
Your decision to multihome your enterprise network will increase the number of prefixes in the default-free zone. How will this affect routers in the IPv6 Internet? (Choose all that apply.)
increases the number of prefix announcements between routers increases memory required to store the routing table increases time to look up entries in the routing table
Which command must you use at the command prompt to determine the names of the network interfaces (including the ISATAP interfaces) on a Windows 7 computer?
ipconfig /all
The TCP process used to maintain an active connection between peers is called which of the following?
keep-alive
On a windows 7 and Windows 10 computer, what are the correct commands to see the TCP connection statistics for IPv4 and IPv6? (Choose two.)
netstat -sp tcp netstat -sp tcpv6
How many host addresses are there in a Class A IPv6 network?
none, because IPv6 doesn't use classes
What does the Windows command netsh interface ipv6 dump do?
outputs a list of commands that can be used to rebuild the current IPv6 configuration
Which of the following mechanisms is part of TCP's error-detection and error-recovery capabilities?
retransmission timer
Of the following tunnel configurations, which one represents the very last segment of the end-to-end tunneling path?
router-to-host
Of the following tunnel configurations, which one is most likely to use configured tunneling because it requires specifically configured end points to the tunnel?
router-to-router
Which of the following are network elements that support a network infrastructure? (Choose all that apply.)
routers VoIP networks clients
Which of the following services are characteristic of a connection-oriented protocol? (Choose all that apply.)
segmentation and reassembly delivery guarantees explicit transmission acknowledgment connection handling
What does TCP use to track the transfer of data and its successful delivery? (Choose all that apply.)
sequence numbers acknowledgments
What kinds of activities are appropriate to perform in a sandbox?
test tunneling schemes test security products test routing protocol changes
In an IPv6 header with five extension headers and a UDP pseudo-header, which Next Header field points to the UDP pseudo-header?
the Next Header field in the last extension header
What makes up the value in the UDP Length field of the IPv6 pseudo-header when using UDP for the transport protocol?
the length of the UDP header plus the data
Which of the following would not affect your choice of interior routing protocol for IPv6?
the size of your circuits
From where does the IPv6 pseudo-header acquire the information for the Upper-Layer Packet Length field when using TCP as the transport protocol?
the value in the Payload Length field in the IPv6 header