400-101 Exam Dumps | In which two modes do IPv6-in-IPv4 tunnels operate? (Choose two.)

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Question 441/449

In which two modes do IPv6-in-IPv4 tunnels operate? (Choose two.)

A. tunnel mode

B. transport mode

C. 6to4 mode

D. 4to6 mode

E. ISATAP mode

Correct Answer: C,E

Explanation/Reference:
Explanation:
*There are 5 tunneling solution in IPv6:*
*1. Using the "Tunnel mode ipv6ip", in this case the tunnel source and destination are configured with IPv4 addressing and the tunnel interface is configured with IPv6. This will use protocol 41.
This is used for IPv6/IPv4.
* R1(config)#int tunnel 1
R1(config-if)#ipv6 address 12:1:12::1/64
R1(config-if)#tunnel source 10.1.12.1
R1(config-if)#tunnel destination 10.1.12.2
R1(config-if)#*tunnel mode ipv6ip*
*2. Using the "Tunnel mode gre ipv6, in this case the tunnel source and destination are all configured with IPv6 addressing. This is used for IPv6/IPv6.
* BB1(config)#int tunnel 1
BB1(config-if)#ipv6 address 121:1:121::111/64
BB1(config-if)#tunnel source 10:1:111::111
BB1(config-if)#tunnel destination 10:1:112::112
BB1(config-if)#*tunnel mode gre ipv6*
*3. In this case, the third type, the tunnel mode is NOT used at all, note that the tunnel interface is configured with IPv6 and the tunnel source and destination is configured with IPv4 but no mention of tunnel mode. This configuration will use protocol 47. This is used for IPv6/IPv4.
* R1(config)#int tunnel 13
R1(config-if)#ipv6 address 13:1:13::1/64
R1(config-if)#tunnel source 10.1.13.1
R1(config-if)#tunnel destination 10.1.13.3
*4. Note in this case a special addressing is assigned to the tunnel interface which is a
concatenation of a reserved IPv6 address of 2002followed by the translated IPv4 address of a given interface on the router. In this configuration ONLY the tunnel source address is used and since the tunnel is automatic, the destination address is NOT configured. The tunnel mode is set to "Tunnel mode ipv6ip
6to4. Note the IPv4 address of 10.1.1.1 is translated to 0A.01.01.01 and once concatenated, it will be
"
2002:0A01:0101: or 2002:A01:101. This is used for IPv6/IPv4.
* R1(config)#interface Tunnel14
R1(config-if)#ipv6 address 2002:A01:101::/128
R1(config-if)#tunnel source 10.1.1.1
R1(config-if)#*tunnel mode ipv6ip 6to4*
* 5. ISATAP, ISATAP works like 6to4 tunnels, with one major difference, it uses a special IPv6 address which is formed as follows: *
In this tunnel mode, the network portion can be any IPv6 address, whereas in 6to4 it had to start with
002.*
Note when the IPv6 address is assigned to the tunnel interface, the "eui-64 is used, in this case the host
* 2
* portion of the IPv6 address starts with "0000.5EFE" and then the rest of the host portion is the translated IPv4 address of the tunnel's source IPv4 address. This translation is performed automatically unlike 6to4.
This is used for IPv6/IPv4.*
R4(config)#int tunnel 46
R4(config-if)#ipv6 address 46:1:46::/64 eui-64
R4(config-if)#tunnel source 10.44.44.44
R4(config-if)#*tunnel mode ipv6ip ISATAP*

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(Choo...; Question 352: In the DiffServ model, which class represents the highest pr...; Question 353: Which three routing protocols utilize TLVs? (Choose three.)...; Question 354: When you configure the ip pmtu command under an L2TPv3 pseud...; Question 355: Refer to the exhibit. When the link between RtrB and RtrC go...; Question 356: Refer to the exhibit. Router 1 and Router 2 use HSRP to prov...; Question 357: Refer to the exhibit. Which two statements are true about th...; Question 358: What is the range of addresses that is used for IPv4-mapped ...; Question 359: Refer to the exhibit. What is the role of this multicast rou...; Question 360: Which statement is true about conditional advertisements?...; Question 361: Which two statements about reverse ARP are true? (Choose two...; Question 362: Refer to the exhibit. Which two statements about this config...; Question 363: Refer to the exhibit. R2 is unable to access the 172.16.1.0/...; Question 364: Which regular expression will match prefixes from the AS 200...; Question 365: As a best practice, when a router is configured as an EIGRP ...; Question 366: Which three factors does Cisco PfR use to calculate the best...; Question 367: Which two statements about BPDU guard are true? (Choose two....; Question 368: Which two options are benefits of EIGRP OTP? (Choose two.)...; Question 369: Which three statements are true about OSPFv3? (Choose three....; Question 370: Which three elements compose a network entity title? (Choose...; Question 371: Which two protocols are used to establish IPv6 connectivity ...; Question 372: What is a reason for an EIGRP router to send an SIA reply to...; Question 373: Refer to the exhibit. Routers R1 and R2 are configured as sh...; Question 374: Refer to the exhibit. What is wrong with the configuration o...; Question 375: Which command do you use to connect a dense-mode domain to a...; Question 376: Which two statements are true about VPLS? (Choose two.)...; Question 377: Refer to the exhibit. You are configuring the S1 switch for ...; Question 378: Which two statements about IPsec VTI implementation are true...; Question 379: Which protocol uses a proprietary 2-byte Type field for mult...; Question 380: How many bytes comprise the system ID within an IS-IS NET?...; Question 381: Which EIGRP packet types are sent as unicast packets?...; Question 382: Which two hashing algorithms can be used when configuring SN...; Question 383: How does having an EIGRP feasible successor speed up converg...; Question 384: Which two statements best describe the difference between ac...; Question 385: Which two statements are true about AAA? (Choose two.)...; Question 386: Which three options are results of the command no mpls ip pr...; Question 387: Refer to the exhibit. What is wrong with the configuration o...; Question 388: Refer to the exhibit. Which two statements are true? (Choose...; Question 389: Which three statements are true about VSS? (Choose three.)...; Question 390: Which authentication types does OSPF support?...; Question 391: In which 802.1D port state are the root bridge, the root por...; Question 392: Which circumstance can cause TCP starvation and UDP dominanc...; Question 393: Refer to the exhibit. Why is the prefix 1.1.1.1/32 not prese...; Question 394: Refer to the exhibit. ASN 64523 has a multihomed BGP setup t...; Question 395: Which three roles does a key server perform when used with G...; Question 396: Refer to the exhibit. Which two issues can cause the interfa...; Question 397: Which three components comprise the structure of a pseudowir...; Question 398: Refer to the exhibit. Which IP packets will be accepted from...; Question 399: Refer to the exhibit. Which statement about the device routi...; Question 400: Refer to the exhibit. If a port is configured as shown and r...; Question 401: Which statement about the feasibility condition in EIGRP is ...; Question 402: In the DiffServ model, which class represents the lowest pri...; Question 403: Refer to the exhibit. NHRP registration is failing; what mig...; Question 404: Which statement about BGP and diverse path advertisement is ...; Question 405: Which neighbor-discovery message type is used to verify conn...; Question 406: Which three capabilities are provided by MLD snooping? (Choo...; Question 407: Which two statements about BGP loop prevention are true? (Ch...; Question 408: Which technology facilitates neighbor IP address resolution ...; Question 409: A configuration includes the line ip nbar port-map SSH tcp 2...; Question 410: Which three statements about Cisco HDLC are true? (Choose th...; Question 411: Which two features improve BGP convergence? (Choose two.)...; Question 412: Which three options are components of an EEM CLI policy? (Ch...; Question 413: You are configuring Wireshark on a Cisco Catalyst 4500E Swit...; Question 414: Which two statements about 6VPE are true? (Choose two.)...; Question 415: Refer to the exhibit. Which two options are possible states ...; Question 416: Where must the spanning-tree timers be configured if they ar...; Question 417: You are backing up a server with a 1 Gbps link and a latency...; Question 418: Which technology can be used to secure the core of an STP do...; Question 419: Consider a network that mixes link bandwidths from 128 kb/s ...; Question 420: Refer to the exhibit. What will be the extended community va...; Question 421: External EIGRP route exchange on routers R1 and R2 was faili...; Question 422: Which two statements are true about an EVPL? (Choose two.)...; Question 423: Refer to the exhibit. If OSPF is implemented on the network,...; Question 424: Which two fields reside in the initial CHAP challenge packet...; Question 425: Refer to the exhibit. What does the return code 3 represent ...; Question 426: Where should the passive-interface command be used?...; Question 427: Which statement describes the effect of the configuration li...; Question 428: What is the most common use for route tagging in EIGRP?...; Question 429: Which BGP feature allows a router to maintain its current BG...; Question 430: With AutoInstall, which mechanism allows for automatic addre...; Question 431: Which statement about shaped round robin queuing is true?...; Question 432: Which two statements about the default behavior of IS-IS are...; Question 433: Which two values comprise the VPN ID for an MPLS VPN? (Choos...; Question 434: Refer to the exhibit. What will be the IP MTU of tunnel 0?...; Question 435: Which two protocols does the Management Plane Protection fea...; Question 436: For which two conditions is Cisco Express Forwarding recursi...; Question 437: Which statement about NAT64 is true?...; Question 438: Which two Cisco IOS XE commands can install a subpackage ont...; Question 439: Refer to the exhibit. Which statement is true about the down...; Question 440: Refer to the exhibit. Which statement about this device conf...; Question 441: In which two modes do IPv6-in-IPv4 tunnels operate? (Choose ...; Question 442: Which option is the default maximum age of the MAC address t...; Question 443: Refer to the exhibit. What happens to packets when traffic i...; Question 444: In which two situations is an EIGRP hello packet sent as uni...; Question 445: Which two technologies are supported by EIGRP? (Choose two.)...; Question 446: Refer to the exhibit. A Cisco Catalyst 6500 Series Switch ex...; Question 447: Which variable in an EEM applet is set when you use the sync...; Question 448: Which algorithm heavily influenced the algorithm used by pat...; Question 449: Refer to the exhibit. Which log levels are enabled for the c...

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