x*********n
发帖数: 28013 | 1 1 交换机的根桥优先级是多少
Without System ID, default is 2^16/2=2^15=32768
with System ID。Only 12 bit as system ID, so it has to be the increment of 2
^12=4096
2 HSRP和VRRP的区别
主要区别。
Cisco propriety vs standard
Assign another virtual IP for communicate VS use one of the IP as virtual IP
3 BGP的wellknow参数和transit参数
well-known mandatory
AS_path
ORIGIN
NEXT_HOP
well-known discretionary
LOCAL_PREF
ATOMIC_AGGREGATE
optional-transitive
The Aggregator of the Route ( AGGREGATOR)
Community String (COMMUNITY)
optional-non-transitive
Multi-Exit Discriminator (MULTI_EXIT_DISC)
Route Originator ID (ORIGINATOR_ID)
Route Cluster List (Cluster List)
4 uni-cast的概念
就是一对一？packet要去哪里，我就送他去哪里，因为我已经有table了。
5 Mac表的建立过程
应该是问how switch forward packet？就是port learning的过程。
因为bridge是直接flood的，switch高级点，就要一个mac address table 去forward，
每一次一个port开始flood，switch就port learning了这个port，然后放在mac
address的source，和destination，下一次如果有人要去的话，就知道了，已经
learned了。
6 ARP工作描述
mapping ip address and mac address
整理了一下，发现特别是第一题，还是不太一样的。以前是没有那个vlan搅和的，现在
有了。
大牛发现有idea可以share的，或者能深入一下的，还请指点我一下啊。。
新人很惨的。555 | s*****g
发帖数: 1055 | 2 Where does the 2^16/2 come from?
32768 simply means the MSB of the two bytes is set, 0x8000, 2^15.
12 bit is reserved for Per-VLAN.
2
IP
【在 x*********n 的大作中提到】
: 1 交换机的根桥优先级是多少
: Without System ID, default is 2^16/2=2^15=32768
: with System ID。Only 12 bit as system ID, so it has to be the increment of 2
: ^12=4096
: 2 HSRP和VRRP的区别
: 主要区别。
: Cisco propriety vs standard
: Assign another virtual IP for communicate VS use one of the IP as virtual IP
: 3 BGP的wellknow参数和transit参数
: well-known mandatory
| m*********1
发帖数: 204 | | x*********n
发帖数: 28013 | 4 哦。
【在 s*****g 的大作中提到】
: Where does the 2^16/2 come from?
: 32768 simply means the MSB of the two bytes is set, 0x8000, 2^15.
: 12 bit is reserved for Per-VLAN.
:
: 2
: IP
| a**********k
发帖数: 1953 | 5 There are 2^16 numbers in two bytes in total, and the
median is the one in the middle, thus divided by 2.
【在 s*****g 的大作中提到】
: Where does the 2^16/2 come from?
: 32768 simply means the MSB of the two bytes is set, 0x8000, 2^15.
: 12 bit is reserved for Per-VLAN.
:
: 2
: IP
|
|
