ICND2 Study Stack Flashcards
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| Distance Vector Protocols send what: | Send the entire table to directly connected routers.
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| Link State Protocols send what: | Details about their directly connected links to all other routers on the network.
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| Administrative Distace for connected route: | 0
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| Administrative Distace for static route | 1
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| Administrative Distace for EIGRP summary | 5
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| Administrative Distace for external BGP | 20
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| Administrative Distace for EIGRP | 90
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| Administrative Distace for IGRP | 100
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| Administrative Distace for OSPF | 110
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| Administrative Distace for ISIS | 115
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| Administrative Distace for RIP | 120
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| Administrative Distace for External EIGRP | 170
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| Administrative Distace for Internal BGP | 200
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| Administrative Distace for unknown | 255
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| Numbers in square brackets on routes are [ / ] | Distance / Metric
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| What does Frame Relay use to build tables of mappings from layer 3 addresses to PVC's | Inverse ARP (show frame-relay map)
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| What is a DLCI | Data Link Connection Identifier is a reference number between the logical DTE (router uasually) and works with the FrameRelay switch
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| When performing Frame-Relay troubleshooting - first step: | Put interface in HDLC encapsulation
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| BECN in Frame Relay = | Backward Explicit congestion Notification
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| FECN in Frame Relay = | Forward Explicit Congestion Notification
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| Frame Relay DE bit is what | A Discard Eligibility which tells the switch the frame is less important.
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| ppp authentication requires what of password | Same password on all routers
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| On frame relay point-to-multipoint has what issues when split horizon enabled - what fixes this issue | Split horizon breaks route summarization. Create sub-interfaces.
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| Point to Point serial links in IPV4 require what of addresses? | That they are in the same subnet
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| What does LMI stand for | Local Management Interface
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| DLC's need to be mapped to what type of IP addresses | Same subnet. Multiple ranges for multiple circuits.
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| On a serial DTE interface - who determines clock rate | CSU/DSU
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| What do LMI's do | Determine operational status of PVCs it knows, Transmit Keepalives every 10 secs, Tell the router what PVC's exist
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| In show frame-relay map for dynamic - what does the IP address refer to | Remote router - learned by inverse ARP
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| CIR stands for what | Commited Information Rate
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| RIP V1 and V2 Metrics | Distance Vector: Hop Count
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| BGP Metrics | Complicated path attribute metrics
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| OSPF Metrics | Bandwidth to compute path 'cost'
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| EIGRP Default Metrics | Bandwidth and Delay by default
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| Which router command is used on a stub network | ip classless
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| Which command displays all EIGRP feasible successor routes? | show ip eigrp topology
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| How to see EIGRP neighbors | show ip eigrp neighbors
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| Three characteristics of OSPF routing protocol usage | 1: Quick conversion, 2: Uses cost to determine best route, 3: OSPF routers discover neighbors before exhanging routes
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| EIGRP Routing metrics: [x/y] | x = Feasible Distance
y = Advertised Distance
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| Which IPsec security protocol should be used when confidentiality is required | ESP [Encapsulation Security Protocol] - the security protocol used by ipsec. Based on encryption and algorithm and a key.
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| Reason for OSPF heirarchical areas: | 1: Confine instability to 1 area, 2: speed up convergence, 3: Reduce routing overhead.
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| Which two nat staements about static NATs are true: | They are aleays present in NAT table, 2 they allow connection to be initiated from the outside.
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| What is the adavantage of multipoint interface instead of p2p for framerelay? | IP addresses can be conserved if VLSM is not being used for subnetting.
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| IPV6 all-router multicast group | FF02::2
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| IPV6 All-nodes multicast group | FF02::1
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| IPV6 EIGRP routers group | FF02::A
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| IPV6 OSPF routers group | FF02::5
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| IPV6 OSPF DR group | FF02::6
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| IPV6 equivilent of loopback address | ::1
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| How to get DLCI from priv mode? | show frame-relay map
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| How to get a static frame-relay map format correct? | frame-relay map ip x.x.x.x DLCI broadcast. You need the address and local DLCI
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| RSTP statements that are true | RSTP defines new port rules (Root, etc) and is compatible with original STP
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| What command shows memory usage by displaying flash and NVRAM utilization | show file systems
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| Purpose of inverse ARP | map known DLCI to an IP
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| What elects a root bridge on PVST+? | Lowest MAC address
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| Show frame-relay map displays what? | Value of local DLCI & status of PVC that is configured on the router.
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| what is the serial connection settings default which should be selected for non cisco routers | PPP
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| Name two true statements about dynamic access lists | They are used to authenticate individual users, and they are used for simpler management in large internetworks.
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| CHAP has what for one way authentication | a Three way handshake and occasional authentication periods.
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| Show only switchports command | sh interfaces switchport
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| Show only trunks command | sh interfaces trunk
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| show only vlan details | sh vlan id x
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| How long does PVST listen | 15 sec
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| How long does PVST learn | 15 sec
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| After PVST listen and learn what happens? | forwarding or blocking
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| EIGRP Multicast address | 224.0.0.10
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| Steps to enable EIGRP | 1: router ip eigrp x
2: network addresses and wildcard
3: change interface hello and hold timers
4: Set bandwidth and delay values
5: Configure EIGRP authentication
6: Configure multiple equal-cost route
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| Where does an accesslist with 1-99 go closest to? | Destination (standard)
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| Where does and access-list with 101-199 go closest to? | Source (extended)
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| Named ACL Chacteristics: | You can delete individual statements in a named acl
Named ACL must be specified and STD or EXTD
You can use the ip access-list command to create named ACLs
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| What shows if an ACL is applied to an interface? | Show ip interface [interface]
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| What are the EIGRP metrics in the route brackets [xxxx/xxxx] | Feasible Distance / Advertised Distance
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| What is EIGRP Advertised distance? | Advertised Distance is the metric that is reported by neighbor routers.
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| What is EIGRP Feasible Distance? | Feasible Distance is the advertised distance + the calculated cost of the link to get there.
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| What is an EIGRP Feasible Successor | Feasible Successors are routes which are guaranteed to be route free.
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| OSPF HELLO PROTOCOLS | Maintains neighbor relationships
Provides dynamic neighbor discovery
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| OSPF hello packet includes two important timers which are: | Hello interval and Dead interval. Dead = 4x hello so 4 can be sent between missed hello and link death.
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| What is required for all EIGRP routers to form relationships? | EIGRP required AS number on all EIGRP neighbors
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| OSPF discovery sequence number 1 | Neighbors discovered with hello packets and placed into 'Neighbor Table'
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| OSPF discovery sequence number 2 | Reliable TCP protocol used to send Link State Advertisements and topology information.
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| OSPF discovery sequence number 3 | Learned topology data placed into 'topology database'
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| OSPF discovery sequence number 4 | Each router runs the SPF algorithm (Djikstra) to calculate shortest path for it.
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| OSPF discovery sequence number 5 | Best routes placed into the IP routing table.
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| RIP 2 uses what port and multicast address? | RIP - UDP 524 / Multicast 224.0.0.9
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| OSPF network statements use what? | Wildcard masks
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| What does EIGRP and OSPF need to enabled on them for routing to work on disparate networks | no auto-summary
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| Show frame-relay map gives you what? | p = command to verify DLCI destination address in a frame relay static configuration.
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| In eigrp-topology what is the successor and feasible successors | successor = Best route
feasible successor = other good routes without loops
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| What is the NAT inside local address? | to IP address that is assigned to a host on the inside network. The address is probably not a public IP
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| What is the NAT inside global address? | a legitimate IP address that represents one or more inside local IP addresses to the world.
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| What is the NAT outside local address? | The IP address of an outside host as it appears to the inside network. Not necessarily a legitimate address, it was allocated from maddress space routable on the inside.
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| What is the NAT outside global address? | the IP address assigned to a host on the outside network by the hostsowner. Globally routable.
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| Dynamic NAT with overload is also called what? | PAT (Port Address Translation)
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| In a NAT table what does a * mean? | It was fast switched
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| How do you verify if NAT is providing translations? | show ip nat translations
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| How do you apply an access list to a debug? | debug ip packet <acl#> det
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| How do you debug NAT? | debug ip nat
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| What is the EIGRP successor route? | The proven route to the destination with the lowest administrative cost.
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