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Networking II > Ch4 Routing Concepts > Flashcards

Ch4 Routing Concepts Flashcards

1
Q

IPv6 Loopback Address

A

::1/128

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2
Q

Data Communications Equipment

A

DCE
Side of serial cable that sends /sets clock rate
Usually Female

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3
Q

Data Terminal Equipment

A

DTE
Side of Serial Cable that receives the clock rate
Usually Male

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4
Q

Network Characteristics (7)

A 
Topology
Speed
Cost
Availability
Security
Scalability
Reliability
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5
Q

Router Memory Types

A

RAM; volatile; system memory runs IOS running config
ROM: non-volatile; bootstrap
NVRAM: non-volatile; startup-config files
Flash: non-volatile: IOS and other system files

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6
Q

Packet Forwarding Mechanisms

A

Process Switching
Fast Switching
Cisco Express Forwarding (CEF)

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7
Q

Process Switching

A

Matches destination address with routing table and determines exit interface; slowest because process is done for every packet incoming.

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8
Q

Fast Switching

A

Uses fast switch cache to store next-hop information; if packet has no known destination then it is process switched then later packets to same destination are fast-switched

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9
Q

Cisco Express Forwarding

A

CEF;Cisco proprietary version of fast switching using Forwarding Information Base(FIB) and adjacency table; not packet triggered but change triggered; fastest
FIB contains pre-computed reverse lookups, next hop router info, and layer 2 information

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10
Q

Information Needed for Router Set-Up

A

IP Address
Subnet Mask
Default Gateway

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11
Q

Configure Switch for IP Address

A 
interface _interface_id
ip address _ip_address subnet_mask
no shutdown
exit
id default-gateway _ip_address
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12
Q

Procedure for Securing Router Management

A 
enable secret _password
line console 0
password 
login
exit
line vty 0 4
password _password
login
exit
service password-encryption
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13
Q

Setting Banner Procedure

A

banner motd $ Message $ ; $= delimiting character which is any character not in message.

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14
Q

Configuring IPv4 Interface on Router

A 
interface _interface_id 
description _240_char_max_description
ip address _ip_address subnet_mask 
clock rate _value_ :sets on DCE side of Serial Cbl
no shutdown
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15
Q

Configuring IPv4 Loopback Interface

A

interface loopback Lo _value
ip address _ip_address subnet_mask
exit

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16
Q

show ip interface brief

A

displays summary of interfaces with IP address and operational status

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17
Q

show ip route

A

displays contents of IPv4 routing table in RAM
C : direct connection
L : local connection

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18
Q

show running-config interface

A

displays configured commands on specific interface.

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19
Q

show interfaces

A

shows interface information and packet flow count for all interfaces on device

20
Q

show ip interfaces

A

displays all IPv4 related info. for all interfaces on router

21
Q

terminal length

A

specifies the number of lines to be displayed before -More- prompt; value of 0 means no pauses

22
Q

Show Filters

A

section
include
exclude
begin

23
Q

show history

A

cmd that will display last 10 lines of commands (default) within a specific level

24
Q

terminal history size

A

cmd that modifies history command buffer size by a specific number of lines

25
Q

3 Major Steps of Routing

A
  1. De-encapsulate layer 2 frame header and trailer to expose Layer 3 packet
  2. Examines destination IP address of packet to find best path in routing table
  3. Re-encapsulates Layer 3 packet into new Layer 2 frame and forwards frame out exit interface
26
Q

3 Path Determinations of Routers

A
  1. Directly Connected Network
  2. Remote Network
  3. No Route Determined: packet dropped with no gateway of last resort present.
27
Q

Dynamic Routing Protocols

A
  1. Routing Information Protocol (RIP): hop count metric
  2. Open Shortest Path First (OPSF) : based on cumulative bandwidth from source to dest.
  3. Enhanced Interior Gateway Routing Protocol (EIGRP)
    Uses bandwidth,delay,load, and reliability to determine best path.
28
Q

Equal Cost Load Balancing

A

using multiple paths with equal cost metrics by sending equal amounts of packets over the paths to reach the destination

29
Q

Administrative Distance(AD)

A

the “trustworthiness” of a route; the lower the value the more “trustworthy” the site

30
Q

Connected AD

A

0

31
Q

Static AD

A

1

32
Q

EIGRP Summary Route AD

A

5

33
Q

External BGP AD

A

Border Gateway Protocol: 20

34
Q

Internal EIGRP AD

A

90

35
Q

IGRP AD

A

Interior Gateway Routing Protocol: 100

36
Q

OSPF AD

A

Open Shortest Path First: 110

37
Q

IS-IS AD

A

Intermediate System to Intermediate System: 115

38
Q

RIP AD

A

Routing Information Protocol: 120

39
Q

External EIGRP

A

170

40
Q

Internal BGP

A

Border Gateway Protocol: 200

41
Q

Routing Table Codes

A 
L : Identifies address assigned to router interface
C: Directly Connected Network
S: Static route
D: network learned from EIGRP
O: network learned from OSPF
42
Q

Remote Network Entry Identifiers

A

Route_Source Dest_Network [Admin. Distance/Metric] via Next-hop_Ip Route_Timestamp Outgoing_interface

43
Q

Directly Connected Network Entry Identifiers

A

Route_Source Destination_Network Outgoing_Interface

44
Q

Benefits of Static Routes

A
  1. Improved Security

2. Resource Efficiency

45
Q

Command to set static route

A

ip route _ip_address subnet_mask {next_hop_ip | exit_interface}

46
Q

Command to set default static route

A

ip route 0.0.0.0 0.0.0.0 {next_hop_ip | exit_interface}

47
Q

router ? (command)

A

global config command used to display which IPv4 protocols a router is capable of using

Networking II (15 decks)

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