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IGP Routing Protocols

1.OSPF NSSA区域不接受类型三的LSA,需要no summary 参数的配置。area area-id nssa no-summary
2.RIP的默认hold timer 是180s
3.EIGRP默认的在以太网上发送hello包的时间间隔为5s .
4.最小的OSPF dead interval 为1s.
5.OSPF的协议号为89 .

6.Which multicast range does RIP version 2 use ? 224.0.0.9  
7.默认的ospf优先级的值：1 
8.Which ospf network type is assigned to loopback interfaces by default ?   stub host 
9.在NBMA（non-broadcast Multi-access ）media 中默认的死亡时间为：120s
10.在广播网络上给DR发送LSAs使用的多播地址：224.0.0.6   反过来是224.0.0.5
11.EIGRP汇总路由的管理距离：5
12.Is 255.255.255.252 a valid OSPF Router ID?   yes
13.What is the Administrative Distance of an On Demand Routing learned route? 160
14.What is the default OSPF network type on a Frame Relay interface?  NBMA
15.What is the maximum hop count allowed for a reachable network in RIP?  15
16.Which interface values are factored into EIGRP’s metric when using the default K-values? bandwidth delay
17.What is the IP protocol number for EIGRP? 88
18.Which OSPF network type is Cisco proprietary?   Point-to-Multipoint No-broadcast
19.What is the Administrative Distance of EIGRP External Routes? 170
20.Which type of OSPF External routes increment cost and will be visible in the backbone area? E1 ,type 1

 

BGP
21.What is the Administrative Distance of Internal BGP learned routes?   200
22.What is the most secure protocol available to be used for authentication of OSPF updates?  MD5
23.On Demand Routing (ODR) is dependent on which Cisco proprietary protocol in order to function?   CDP
24.Which UDP port do RIPv2 updates get sent to?  520
25.Which TCP port is used for BGP to establish connections?  179
26.What is the lowest private Autonomous System number available for BGP?   64512
27.How frequently (in seconds) does the BGP scanner run?    60S
28.When using the BGP "aggregate-address" command with the "as-set" keyword does BGP set the "ATOMIC AGGREGATE"

option in the advertised summary?     NO 
29.Is a BGP local preference of 50 more preferable to the default local preference value? NO
30.What is the default value interpreted to be if the BGP Multiple Exit Discriminator is missing in a received update?  0
31.How many bits are used for the BGP Cluster-ID attribute?    32bits
32.Will an update with the "no-export" community attached pass between Sub-Autonomous Systems within a BGP

     Confederation?  yes
33.What is the default penalty applied when a link flaps and BGP dampening is enabled?   1000
34.What is the maximum delay, in seconds, before a BGP-speaking networking device sends its updates? 120 
35.What is the most preferred BGP Origin type?  internal
36.Will an update with the "local-as" community attached pass between Sub-Autonomous Systems within a BGP Confederation?       NO

37.Which BGP attribute is attached to updates sent to an EBGP neighbor when trying to influence which path they use to send traffic into your network?  MED
38.Would the BGP regular expression "^820_.*_12" match the AS Path "820 1546 9612 12"?      NO 

Multicast
39.Which value is used in the first octet of a GLOP multicast address? 233
40.What is the default interval between PIM hello packets?  30s
41.Which PIM mode requires the use of a Rendezvous Point?  PIM sparse mode
42.Which Rendezvous Point announcement method was designed by the IETF? BSR
43.Which protocol is used between hosts and their local multicast router to advise that they wish to join and leave

     multicast groups?      IGMP
44.Which multicast address is reserved to identify all routers on a subnet? 224.0.0.2
45.Which value is used in the first octet for the privately scoped multicast range? 239
46.Which protocol is leveraged by Anycast-RP to exchange source announcement messages?   MSDP
47.Which multicast address is used by PIM to send hello messages to neighbors? 224.0.0.13

 

MISC
48.What is the IP Protocol Number for Generic Routing Encapsulation (GRE)? 47
49.DHCP packets sent from a server to a client use which UDP destination port?  68
50.How many bits are used in the network portion of a Class B IP address? 16
51.Which are the names of the two ICMP packet types used when sending Ping traffic?  echo,echo-reply
52.What value should the config register of a router have during normal operations? 0x2102
53.How frequently are CDP updates sent out an interface by default, in seconds? 60s
54.Domain Name Service (DNS) uses which UDP port when contacting a server? 53
55.Secure Shell (SSH) uses which well known TCP port?  22
56.Which First Hop Redundancy Protocol is vendor neutral and defined by the IETF?   VRRP
57.If Router A has a HSRP priority of 90 and Router B has the default HSRP priority, assuming that they are a HSRP pair with preemption enabled, which would be the Active router?  B
58.Which UDP port does SNMP use to send traps to a Manager? 162
59.Which UDP port does Network Time Protocol (NTP) use to send updates? 123

 

IPV6
60.What is the hexadecimal string inserted into the middle of a MAC address when EUI-64 addresses are generated for IPv6?     FFFE
61.Is 326B:34:45:12::2 a valid IPv6 address?   Yes

62.Which prefix is used to delineate IPv6 6to4 tunnel addresses? 2002
63.How many bits are used in the Router ID for OSPFv3 for IPv6? 32
64.Which range of addresses does IPv6 use for multicast traffic, in CIDR notation? FF00::/8
65.Is 346B:034:0:3402::32::1 a valid IPv6 address? NO

 

Switching
66.What is the IEEE standard used to define Multiple Spanning Trees? 802.1s
67.How many different port states are used by Rapid Spanning Tree Protocol (802.1w)?  3
68.Can VLAN 1005 be created in VTP Server mode?  yes
69.What is the default value, in seconds, of the max-age timer in Spanning Tree Protocol? 20s
70.Which VTP mode can create, modify and delete VLANs, but does not send them to other VTP neighbors?transparent
71.Which Ethertype value is used for IPv4 traffic? 0x8000 或者0x0800
72.Which Ethertype value is used for IPv6 traffic? 0x86DD
73.What is the default priority value for Spanning Tree Protocol? 32768
74.How many seconds will an interface wait before it starts forwarding traffic if PortFast is enabled?  0
75.What is the default VTP mode on a Cisco switch? Server
76.Which Cisco proprietary protocol can be used to negotiate Etherchannel links? Pagp
77.Which protocol is used to negotiate trunking? DTP
78.What is the default hello time in Rapid Spanning Tree Protocol? 2s
79.Which instance number are all VLANs assigned to by default when implementing Multiple Spanning Tree?  0

 

WAN
80.Which authentication protocol is the least secure method used with PPP authentication? PAP
81.What are the frame relay LMI types? cisco ,ANSI,Q933a
82.What are the frame relay encapsulation types? cisco,IETF
83.Which field in the frame relay header is used to indicate that the frame has less importance than others? DE
84.Which field in the frame relay header represents the virtual connection between the DTE device and the switch? DLCI
85.How often are frame relay LMI keepalives sent by default, in seconds? 10s
86.How often are frame relay LMI full status updates sent by default, in seconds? 60
87.Which end of a serial link questions the clock rate for the link? DCE
88.What is the default Bc on a frame relay DLCI running Frame Relay Traffic Shaping if no map class is configured, in bits?   7000

 

QOS
89.How many queues can be configured when using priority queuing?  4
90.How many user definable queues can be configured with custom queuing? 64
91.How many packets are allowed by default in a queue with custom queuing enabled? 20
92.What is the default byte count in a queue when using custom queuing? 1500bytes
93.How many bits of the IP TOS byte are used to allocate DSCP values? 6
94.Which protocol is used for the Integrated Services QOS model? RSVP
95.What is the DSCP value (0-63) for AF21? 18
96.How many classes can be defined in Class Based Weighted Fair Queuing (CBWFQ)? 256
97.What percentage of link bandwidth is assigned to the "class-default" class when using Class Based Weighted Fair Queuing by default? 25
98.What is the DSCP value (0-63) for Expedited Forwarding (EF)? 46
99.Will "access-list 10 permit 192.168.0.0 0.0.2.255" match traffic with the source IP of 192.168.3.55?  NO

 

Security
100.Which protocol must be used for communicating with a AAA server when implementing 802.1x? RADIUS

 

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