ipv6 address stateless autoconfig - OSPFv3 Verification Commands

OSPFv3 Verification Commands

D. ipv6 address stateless autoconfig

7. Which command is used to configure the static IPv6 default route? (Source: Configuring IPv6 Routing)

A. ipv6 route ::/0 interface next_hop B. ipv6 route default interface next_hop C. ipv6 route 0.0.0.0/0 interface next_hop D. ip route 0.0.0.0/0 interface next_hop

8. Which item represents similarities between OSPFv3 and OSPFv2? (Source: Configuring IPv6 Routing)

A. support for IPv4 and IPv6 B. support for IPv4

C. enabled per-link, rather than per-network, using network statements D. link-state routing protocols

Answer Key

1. A

2. B

3. A, C, D

4. A

5. A, C

6. B

7. A

8. D

Glossary

Term Definition

ARP Address Resolution Protocol. Internet protocol that is used to map an IP address to a MAC address. Defined in RFC 826.

AS autonomous system. A collection of networks under a common

administration sharing a common routing strategy. Autonomous systems are subdivided by areas. An autonomous system must be assigned a unique 16-bit number by the IANA.

BDR backup designated router.

BGP Border Gateway Protocol. Interdomain routing protocol that replaces EGP. BGP exchanges reachability information with other BGP systems. It is defined by RFC 1163.

CIDR classless interdomain routing. Technique supported by BGP4 and based on route aggregation. CIDR allows routers to group routes together to reduce the quantity of routing information carried by the core routers. With CIDR, several IP networks appear to networks outside the group as a single, larger entity. With CIDR, IP addresses and their subnet masks are written as four octets, separated by periods, followed by a forward slash and a two-digit number that represents the subnet mask.

CSU channel service unit. Digital interface device that connects end-user equipment to the local digital telephone loop. Often referred to together with DSU, as CSU/DSU.

DDNS Dynamic Domain Name System

DHCP Dynamic Host Configuration Protocol. Provides a mechanism for allocating IP addresses dynamically so that addresses can be reused when hosts no longer need them.

DNS Domain Name System. System used on the Internet for translating names of network nodes into addresses.

DR designated router.

DSU data service unit. Device used in digital transmission that adapts the physical interface on a DTE device to a transmission facility, such as T1 or E1. The DSU also is responsible for such functions as signal timing. Often referred to together with CSU, as CSU/DSU.

DTP Dynamic Trunking Protocol.

EGP Exterior Gateway Protocol. Internet protocol for exchanging routing information between autonomous systems. Documented in RFC 904.

Not to be confused with the general term exterior gateway protocol.

EGP is an obsolete protocol that was replaced by BGP.

Term Definition

EIGRP Enhanced Interior Gateway Routing Protocol. Advanced version of IGRP developed by Cisco. Provides superior convergence properties and operating efficiency, and combines the advantages of link-state protocols with those of distance vector protocols.

EUI extended universal identifier

FCS frame check sequence. Extra characters added to a frame for error control purposes. Used in HDLC, Frame Relay, and other data link layer protocols.

GARP Gratuitous Address Resolution Protocol.

giaddr gateway IP address

Gigabit Ethernet Standard for a high-speed Ethernet, approved by the IEEE (Institute of Electrical and Electronics Engineers) 802.3z standards committee in 1996.

IANA Internet Assigned Numbers Authority. Organization operated under the auspices of the ISOC as a part of the IAB. IANA delegates authority for IP address-space allocation and domain-name assignment to the InterNIC and other organizations. IANA also maintains a database of assigned protocol identifiers used in the TCP/IP stack, including autonomous system numbers.

ICMP Internet Control Message Protocol. Network layer Internet protocol that reports errors and provides other information relevant to IP packet processing. Documented in RFC 792.

IEEE 802.1Q The IEEE 802.1Q specification establishes a standard method for tagging Ethernet frames with VLAN membership information and defines the operation of VLAN bridges that permit the definition, operation, and administration of VLAN topologies within a bridged LAN infrastructure.

IETF Internet Engineering Task Force. Task force consisting of over 80 working groups responsible for developing Internet standards. The IETF operates under the auspices of ISOC.

IGP interior gateway protocol. Internet protocol used to exchange routing information within an autonomous system. Examples of common Internet IGPs include IGRP, OSPF, and RIP.

Term Definition

IPv4 IP version 4

IPv6 IP version 6. Replacement for the current version of IP (version 4).

IPv6 includes support for flow ID in the packet header, which can be used to identify flows. Formerly called IPng (next generation).

IS-IS Intermediate System-to-Intermediate System. OSI link-state hierarchical routing protocol based on DECnet Phase V routing, whereby ISs (routers) exchange routing information based on a single metric to determine network topology.

ISP Internet service provider. Company that provides Internet access to other companies and individuals.

LSA link-state advertisement. Broadcast packet used by link-state protocols that contains information about neighbors and path costs.

LSAs are used by the receiving routers to maintain their routing tables. Sometimes called an LSP.

LSA link-state advertisement. Broadcast packet used by link-state protocols that contains information about neighbors and path costs.

LSAs are used by the receiving routers to maintain their routing tables. Sometimes called an LSP.

MP-BGP Multiprotocol Border Gateway Protocol

MTU maximum transmission unit. Maximum packet size, in bytes, that a particular interface can handle.

multicast address Single address that refers to multiple network devices. Synonymous with group address.

NAT Network Address Translation. Mechanism for reducing the need for globally unique IP addresses. NAT allows an organization with addresses that are not globally unique to connect to the Internet by translating those addresses into globally routable address space. Also known as Network Address Translator.

NIC network interface card. Board that provides network communication capabilities to and from a computer system. Also called an adapter.

OSPF Open Shortest Path First. Link-state, hierarchical IGP routing

algorithm proposed as a successor to RIP in the Internet community.

OSPF features include least-cost routing, multipath routing, and load balancing. OSPF was derived from an early version of the IS-IS protocol.

OSPF Open Shortest Path First. Link-state, hierarchical IGP routing

algorithm proposed as a successor to RIP in the Internet community.

OSPF features include least-cost routing, multipath routing, and load balancing. OSPF was derived from an early version of the IS-IS protocol.

OUI Organizational Unique Identifier. Three octets that are assigned by the IEEE in a block of 48-bit LAN addresses.

Term Definition

POP Post Office Protocol. Protocol that client email applications use to retrieve mail from a mail server.

RIP Routing Information Protocol. IGP supplied with UNIX BSD systems.

The most common IGP in the Internet. RIP uses hop count as a routing metric.

RIPng Routing Information Protocol next generation

RIR regional Internet registry

SLA service level agreement.

SPF shortest path first. Routing algorithm that iterates on length of path to determine a shortest-path spanning tree. Commonly used in link-state routing algorithms. Sometimes called Dijkstra's algorithm.

SSH Secure Shell Protocol. Protocol that provides a secure remote connection to a router through a TCP application.

STP Spanning Tree Protocol. Bridge protocol that uses the spanning-tree algorithm, enabling a learning bridge to dynamically work around loops in a network topology by creating a spanning tree. Bridges exchange BPDU messages with other bridges to detect loops, and then remove the loops by shutting down selected bridge interfaces.

Refers to both the IEEE 802.1 Spanning Tree Protocol standard and the earlier Digital Equipment Corporation Spanning Tree Protocol upon which it is based. The IEEE version supports bridge domains and allows the bridge to construct a loop-free topology across an extended LAN. The IEEE version generally is preferred over the Digital version.

SVI switch virtual interface

ToS type of service

UDP User Datagram Protocol. Connectionless transport layer protocol in the TCP/IP protocol stack. UDP is a simple protocol that exchanges datagrams without acknowledgments or guaranteed delivery, requiring that error processing and retransmission be handled by other protocols. UDP is defined in RFC 768.

VLSM variable-length subnet mask. Capability to specify a different subnet mask for the same network number on different subnets. VLSM can help optimize available address space.

In document ICND120SG_Vol2 (Page 132-138)