读一读，补全对话。

Eric: Hi, Bob. The holiday is coming. What will you do during the holiday?

Bob: Oh, hi Eric. I will go and visit my uncle.

Eric: 1________________________________________________________?

Bob: I will go with my sister.

Eric: 2________________________________________________________? 

Bob: We will go next Friday in the afternoon.

Eric: 3________________________________________________________?

Bob: No. We will go by train.

Eric: 4________________________________________________________?

Bob: We will go fishing with my uncle!

Eric: Wow, sounds great!

交换式局域网的核心是 (34) 。局域网交换机可以在交换机的多个端口之间同时建立多个 (35) 。对于交换式以太网的说法不正确的是 (36) 。

A．路由器

B．服务器

C．局域网交换机

D．带宽